3041 en us localization (#3060)

* Initial locaization from international english to United States English

examples:
favourite -> favorite
optimise -> optimize
occured -> occurred
labelled -> labelled
ok -> okay

* More spelling corrections

default English occured->occurred
cancelled -> canceled
labelled -> labeled

* Undo key spelling change

* i18n format and admin.php translating

* Translating admin.php

* more admin.php translating

* Translating conf.php

* Translating feedback.php and format command

* Translating gen.php

* Translating index.php

* Translating sub.php

* Translating user.php

* Translating install.php

* Fix 'there is no idle feed'

* FIx 'there is no feed to refresh"

* Add i18n manipulation option to ignore all unmodified translation keys

* Lint fixes

* Update keys newly add since original branch

* Revert unintenntional ru 'translation'

* Code review revisions

* Fix leading whitespace in ignore_unmodified api

* Update app/i18n/en-us/gen.php

Co-authored-by: Frans de Jonge <fransdejonge@gmail.com>

* Update app/i18n/en-us/admin.php

Co-authored-by: Frans de Jonge <fransdejonge@gmail.com>

* Update app/i18n/en-us/admin.php

Co-authored-by: Frans de Jonge <fransdejonge@gmail.com>

* Update error message for Make ignore-unmodified keys to use Make syntax.
(inline with 3062) Also rename ignore-unmodifed-key ->
ignore-unmodified-keys

* Replace makefile leading spaces with tabs

* Code review revisions

* Retab added php functions

* Missed tab replace

* Remove stray '-> todo'

Co-authored-by: root <root@x-freshrss.lan.ewsandor.com>
Co-authored-by: Frans de Jonge <fransdejonge@gmail.com>

43 files changed, 1880 insertions, 5 deletions

diff --git a/Makefile b/Makefile
index fd5eccfdd..d19d40fa6 100644
--- a/Makefile
+++ b/Makefile
@@ -140,6 +140,14 @@ endif
 	@$(PHP) ./cli/manipulate.translation.php -a ignore -k $(key) -l $(lang)
 	@echo Key ignored.
 
+.PHONY: i18n-ignore-unmodified-keys
+i18n-ignore-unmodified-keys: ## Ignore all unmodified translation keys for the selected language
+ifndef lang
+	$(error To ignore unmodified keys, you need to provide a language in the "lang" variable)
+endif
+	@$(PHP) ./cli/manipulate.translation.php -a ignore_unmodified -l $(lang)
+	@echo Unmodified keys ignored.
+
 .PHONY: i18n-key-exists
 i18n-key-exists: ## Check if a translation key exists
 ifndef key
diff --git a/app/i18n/cz/gen.php b/app/i18n/cz/gen.php
index 6d96d02d1..cdebafd21 100644
--- a/app/i18n/cz/gen.php
+++ b/app/i18n/cz/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',	// TODO - Translation
 		'de' => 'Deutsch',	// TODO - Translation
 		'en' => 'English',	// TODO - Translation
+		'en-us' => 'English (United States)',
 		'es' => 'Español',	// TODO - Translation
 		'fr' => 'Français',	// TODO - Translation
 		'he' => 'עברית',	// TODO - Translation
diff --git a/app/i18n/de/gen.php b/app/i18n/de/gen.php
index edccdea5f..4de06df8a 100644
--- a/app/i18n/de/gen.php
+++ b/app/i18n/de/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',	// TODO - Translation
 		'de' => 'Deutsch',	// TODO - Translation
 		'en' => 'English',	// TODO - Translation
+		'en-us' => 'English (United States)',
 		'es' => 'Español',	// TODO - Translation
 		'fr' => 'Français',	// TODO - Translation
 		'he' => 'עברית',	// TODO - Translation
diff --git a/app/i18n/en-us/admin.php b/app/i18n/en-us/admin.php
new file mode 100644
index 000000000..00dc2726a
--- /dev/null
+++ b/app/i18n/en-us/admin.php
@@ -0,0 +1,210 @@
+<?php
+
+return array(
+	'auth' => array(
+		'allow_anonymous' => 'Allow anonymous reading of the default user\'s articles (%s)',
+		'allow_anonymous_refresh' => 'Allow anonymous refresh of the articles',
+		'api_enabled' => 'Allow <abbr>API</abbr> access <small>(required for mobile apps)</small>',
+		'form' => 'Web form (traditional, requires JavaScript)',
+		'http' => 'HTTP (for advanced users with HTTPS)',
+		'none' => 'None (dangerous)',
+		'title' => 'Authentication',
+		'title_reset' => 'Authentication reset',
+		'token' => 'Authentication token',
+		'token_help' => 'Allows access to RSS output of the default user without authentication:',
+		'type' => 'Authentication method',
+		'unsafe_autologin' => 'Allow unsafe automatic login using the format: ',
+	),
+	'check_install' => array(
+		'cache' => array(
+			'nok' => 'Check permissions on <em>./data/cache</em> directory. HTTP server must have write permission.',
+			'ok' => 'Permissions on the cache directory are good.',
+		),
+		'categories' => array(
+			'nok' => 'Category table is improperly configured.',
+			'ok' => 'Category table is okay.',
+		),
+		'connection' => array(
+			'nok' => 'Connection to the database cannot be established.',
+			'ok' => 'Connection to the database is okay.',
+		),
+		'ctype' => array(
+			'nok' => 'Cannot find a required library for character type checking (php-ctype).',
+			'ok' => 'You have the required library for character type checking (ctype).',
+		),
+		'curl' => array(
+			'nok' => 'Cannot find the cURL library (php-curl package).',
+			'ok' => 'You have the cURL library.',
+		),
+		'data' => array(
+			'nok' => 'Check permissions on <em>./data</em> directory. HTTP server must have write permission.',
+			'ok' => 'Permissions on the data directory are good.',
+		),
+		'database' => 'Database installation',
+		'dom' => array(
+			'nok' => 'Cannot find a required library to browse the DOM (php-xml package).',
+			'ok' => 'You have the required library to browse the DOM.',
+		),
+		'entries' => array(
+			'nok' => 'Entry table is improperly configured.',
+			'ok' => 'Entry table is okay.',
+		),
+		'favicons' => array(
+			'nok' => 'Check permissions on <em>./data/favicons</em> directory. HTTP server must have write permission.',
+			'ok' => 'Permissions on the favicons directory are good.',
+		),
+		'feeds' => array(
+			'nok' => 'Feed table is improperly configured.',
+			'ok' => 'Feed table is okay.',
+		),
+		'fileinfo' => array(
+			'nok' => 'Cannot find the PHP fileinfo library (fileinfo package).',
+			'ok' => 'You have the fileinfo library.',
+		),
+		'files' => 'File installation',
+		'json' => array(
+			'nok' => 'Cannot find JSON (php-json package).',
+			'ok' => 'You have the JSON extension.',
+		),
+		'mbstring' => array(
+			'nok' => 'Cannot find the recommended mbstring library for Unicode.',
+			'ok' => 'You have the recommended mbstring library for Unicode.',
+		),
+		'minz' => array(
+			'nok' => 'Cannot find the Minz framework.',
+			'ok' => 'You have the Minz framework.',
+		),
+		'pcre' => array(
+			'nok' => 'Cannot find a required library for regular expressions (php-pcre).',
+			'ok' => 'You have the required library for regular expressions (PCRE).',
+		),
+		'pdo' => array(
+			'nok' => 'Cannot find PDO or one of the supported drivers (pdo_mysql, pdo_sqlite, pdo_pgsql).',
+			'ok' => 'You have PDO and at least one of the supported drivers (pdo_mysql, pdo_sqlite, pdo_pgsql).',
+		),
+		'php' => array(
+			'_' => 'PHP installation',
+			'nok' => 'Your PHP version is %s but FreshRSS requires at least version %s.',
+			'ok' => 'Your PHP version (%s) is compatible with FreshRSS.',
+		),
+		'tables' => array(
+			'nok' => 'There are one or more missing tables in the database.',
+			'ok' => 'The appropriate tables exist in the database.',
+		),
+		'title' => 'Installation check',
+		'tokens' => array(
+			'nok' => 'Check permissions on <em>./data/tokens</em> directory. HTTP server must have write permission',
+			'ok' => 'Permissions on the tokens directory are good.',
+		),
+		'users' => array(
+			'nok' => 'Check permissions on <em>./data/users</em> directory. HTTP server must have write permission',
+			'ok' => 'Permissions on the users directory are good.',
+		),
+		'zip' => array(
+			'nok' => 'Cannot find the ZIP extension (php-zip package).',
+			'ok' => 'You have the ZIP extension.',
+		),
+	),
+	'extensions' => array(
+		'author' => 'Author',
+		'community' => 'Available community extensions',
+		'description' => 'Description',
+		'disabled' => 'Disabled',
+		'empty_list' => 'There are no installed extensions',
+		'enabled' => 'Enabled',
+		'latest' => 'Installed',
+		'name' => 'Name',
+		'no_configure_view' => 'This extension cannot be configured.',
+		'system' => array(
+			'_' => 'System extensions',
+			'no_rights' => 'System extension (you do not have the required permissions)',
+		),
+		'title' => 'Extensions',
+		'update' => 'Update available',
+		'user' => 'User extensions',
+		'version' => 'Version',
+	),
+	'stats' => array(
+		'_' => 'Statistics',
+		'all_feeds' => 'All feeds',
+		'category' => 'Category',
+		'entry_count' => 'Entry count',
+		'entry_per_category' => 'Entries per category',
+		'entry_per_day' => 'Entries per day (last 30 days)',
+		'entry_per_day_of_week' => 'Per day of week (average: %.2f messages)',
+		'entry_per_hour' => 'Per hour (average: %.2f messages)',
+		'entry_per_month' => 'Per month (average: %.2f messages)',
+		'entry_repartition' => 'Entries repartition',
+		'feed' => 'Feed',
+		'feed_per_category' => 'Feeds per category',
+		'idle' => 'Idle feeds',
+		'main' => 'Main statistics',
+		'main_stream' => 'Main stream',
+		'menu' => array(
+			'idle' => 'Idle feeds',
+			'main' => 'Main statistics',
+			'repartition' => 'Articles repartition',
+		),
+		'no_idle' => 'There are no idle feeds!',
+		'number_entries' => '%d articles',
+		'percent_of_total' => '%% of total',
+		'repartition' => 'Articles repartition',
+		'status_favorites' => 'Favorites',
+		'status_read' => 'Read',
+		'status_total' => 'Total',
+		'status_unread' => 'Unread',
+		'title' => 'Statistics',
+		'top_feed' => 'Top ten feeds',
+	),
+	'system' => array(
+		'_' => 'System configuration',
+		'auto-update-url' => 'Auto-update server URL',
+		'cookie-duration' => array(
+			'help' => 'in seconds',
+			'number' => 'Duration to keep logged in',
+		),
+		'force_email_validation' => 'Force email address validation',
+		'instance-name' => 'Instance name',
+		'max-categories' => 'Max number of categories per user',
+		'max-feeds' => 'Max number of feeds per user',
+		'registration' => array(
+			'help' => '0 means that there is no account limit',
+			'number' => 'Max number of accounts',
+		),
+	),
+	'update' => array(
+		'_' => 'Update system',
+		'apply' => 'Apply',
+		'check' => 'Check for new updates',
+		'current_version' => 'Your current version of FreshRSS is %s.',
+		'last' => 'Last verification: %s',
+		'none' => 'No update to apply',
+		'title' => 'Update system',
+	),
+	'user' => array(
+		'admin' => 'Administrator',
+		'article_count' => 'Articles',
+		'articles_and_size' => '%s articles (%s)',
+		'back_to_manage' => '← Return to user list',
+		'create' => 'Create new user',
+		'database_size' => 'Database size',
+		'delete_users' => 'Delete user',
+		'email' => 'Email address',
+		'enabled' => 'Enabled',
+		'feed_count' => 'Feeds',
+		'is_admin' => 'Is admin',
+		'language' => 'Language',
+		'last_user_activity' => 'Last user activity',
+		'list' => 'User list',
+		'number' => 'There is %d account created',
+		'numbers' => 'There are %d accounts created',
+		'password_form' => 'Password<br /><small>(for the Web-form login method)</small>',
+		'password_format' => 'At least 7 characters',
+		'selected' => 'Selected user',
+		'title' => 'Manage users',
+		'update_users' => 'Update user',
+		'user_list' => 'List of users',
+		'username' => 'Username',
+		'users' => 'Users',
+	),
+);
diff --git a/app/i18n/en-us/conf.php b/app/i18n/en-us/conf.php
new file mode 100644
index 000000000..a5a5cb2f9
--- /dev/null
+++ b/app/i18n/en-us/conf.php
@@ -0,0 +1,202 @@
+<?php
+
+return array(
+	'archiving' => array(
+		'_' => 'Archiving',
+		'delete_after' => 'Remove articles after',
+		'exception' => 'Purge exception',
+		'help' => 'More options are available in the individual feed\'s settings',
+		'keep_favourites' => 'Never delete favorites',
+		'keep_labels' => 'Never delete labels',
+		'keep_max' => 'Maximum number of articles to keep',
+		'keep_min_by_feed' => 'Minimum number of articles to keep per feed',
+		'keep_period' => 'Maximum age of articles to keep',
+		'keep_unreads' => 'Never delete unread articles',
+		'maintenance' => 'Maintenance',
+		'optimize' => 'Optimize database',
+		'optimize_help' => 'Run occasionally to reduce the size of the database',
+		'policy' => 'Purge policy',
+		'policy_warning' => 'If no purge policy is selected, every article will be kept.',
+		'purge_now' => 'Purge now',
+		'title' => 'Archiving',
+		'ttl' => 'Do not automatically refresh more often than',
+	),
+	'display' => array(
+		'_' => 'Display',
+		'icon' => array(
+			'bottom_line' => 'Bottom line',
+			'display_authors' => 'Authors',
+			'entry' => 'Article icons',
+			'publication_date' => 'Date of publication',
+			'related_tags' => 'Article tags',
+			'sharing' => 'Sharing',
+			'top_line' => 'Top line',
+		),
+		'language' => 'Language',
+		'notif_html5' => array(
+			'seconds' => 'seconds (0 means no timeout)',
+			'timeout' => 'HTML5 notification timeout',
+		),
+		'show_nav_buttons' => 'Show the navigation buttons',
+		'theme' => 'Theme',
+		'title' => 'Display',
+		'width' => array(
+			'content' => 'Content width',
+			'large' => 'Wide',
+			'medium' => 'Medium',
+			'no_limit' => 'Full Width',
+			'thin' => 'Narrow',
+		),
+	),
+	'profile' => array(
+		'_' => 'Profile management',
+		'api' => 'API management',
+		'delete' => array(
+			'_' => 'Account deletion',
+			'warn' => 'Your account and all related data will be deleted.',
+		),
+		'email' => 'Email address',
+		'password_api' => 'API password<br /><small>(e.g., for mobile apps)</small>',
+		'password_form' => 'Password<br /><small>(for the Web-form login method)</small>',
+		'password_format' => 'At least 7 characters',
+		'title' => 'Profile',
+	),
+	'query' => array(
+		'_' => 'User queries',
+		'deprecated' => 'This query is no longer valid. The referenced category or feed has been deleted.',
+		'display' => 'Display user query results',
+		'filter' => 'Filter applied:',
+		'get_all' => 'Display all articles',
+		'get_category' => 'Display "%s" category',
+		'get_favorite' => 'Display favorite articles',
+		'get_feed' => 'Display "%s" feed',
+		'no_filter' => 'No filter',
+		'none' => 'You haven’t created any user queries yet.',
+		'number' => 'Query n°%d',
+		'order_asc' => 'Display oldest articles first',
+		'order_desc' => 'Display newest articles first',
+		'remove' => 'Remove user query',
+		'search' => 'Search for "%s"',
+		'state_0' => 'Display all articles',
+		'state_1' => 'Display read articles',
+		'state_2' => 'Display unread articles',
+		'state_3' => 'Display all articles',
+		'state_4' => 'Display favorite articles',
+		'state_5' => 'Display read favorite articles',
+		'state_6' => 'Display unread favorite articles',
+		'state_7' => 'Display favorite articles',
+		'state_8' => 'Display not favorite articles',
+		'state_9' => 'Display read not favorite articles',
+		'state_10' => 'Display unread not favorite articles',
+		'state_11' => 'Display not favorite articles',
+		'state_12' => 'Display all articles',
+		'state_13' => 'Display read articles',
+		'state_14' => 'Display unread articles',
+		'state_15' => 'Display all articles',
+		'title' => 'User queries',
+	),
+	'reading' => array(
+		'_' => 'Reading',
+		'after_onread' => 'After “mark all as read”,',
+		'always_show_favorites' => 'Show all articles in favorites by default',
+		'articles_per_page' => 'Number of articles per page',
+		'auto_load_more' => 'Load more articles at the bottom of the page',
+		'auto_remove_article' => 'Hide articles after reading',
+		'confirm_enabled' => 'Display a confirmation dialog on “mark all as read” actions',
+		'display_articles_unfolded' => 'Show articles unfolded by default',
+		'display_categories_unfolded' => 'Categories to unfold',
+		'hide_read_feeds' => 'Hide categories & feeds with no unread articles (does not work with “Show all articles” configuration)',
+		'img_with_lazyload' => 'Use "lazy load" mode to load pictures',
+		'jump_next' => 'jump to next unread sibling (feed or category)',
+		'mark_updated_article_unread' => 'Mark updated articles as unread',
+		'number_divided_when_reader' => 'Divide by 2 in the reading view.',
+		'read' => array(
+			'article_open_on_website' => 'when the article is opened on its original website',
+			'article_viewed' => 'when the article is viewed',
+			'scroll' => 'while scrolling',
+			'upon_reception' => 'upon receiving the article',
+			'when' => 'Mark an article as read…',
+		),
+		'show' => array(
+			'_' => 'Articles to display',
+			'active_category' => 'Active category',
+			'adaptive' => 'Adjust showing',
+			'all_articles' => 'Show all articles',
+			'all_categories' => 'All categories',
+			'no_category' => 'No category',
+			'unread' => 'Show only unread',
+		),
+		'sides_close_article' => 'Clicking outside of article text area closes the article',
+		'sort' => array(
+			'_' => 'Sort order',
+			'newer_first' => 'Newest first',
+			'older_first' => 'Oldest first',
+		),
+		'sticky_post' => 'Stick the article to the top when opened',
+		'title' => 'Reading',
+		'view' => array(
+			'default' => 'Default view',
+			'global' => 'Global view',
+			'normal' => 'Normal view',
+			'reader' => 'Reading view',
+		),
+	),
+	'sharing' => array(
+		'_' => 'Sharing',
+		'add' => 'Add a sharing method',
+		'blogotext' => 'Blogotext',
+		'diaspora' => 'Diaspora*',
+		'email' => 'Email',
+		'facebook' => 'Facebook',
+		'more_information' => 'More information',
+		'print' => 'Print',
+		'remove' => 'Remove sharing method',
+		'shaarli' => 'Shaarli',
+		'share_name' => 'Share name to display',
+		'share_url' => 'Share URL to use',
+		'title' => 'Sharing',
+		'twitter' => 'Twitter',
+		'wallabag' => 'wallabag',
+	),
+	'shortcut' => array(
+		'_' => 'Shortcuts',
+		'article_action' => 'Article actions',
+		'auto_share' => 'Share',
+		'auto_share_help' => 'If there is only one sharing mode, it is used. Otherwise, modes are accessible by their number.',
+		'close_dropdown' => 'Close menus',
+		'collapse_article' => 'Collapse',
+		'first_article' => 'Open the first article',
+		'focus_search' => 'Access search box',
+		'global_view' => 'Switch to global view',
+		'help' => 'Display documentation',
+		'javascript' => 'JavaScript must be enabled in order to use shortcuts',
+		'last_article' => 'Open the last article',
+		'load_more' => 'Load more articles',
+		'mark_favorite' => 'Toggle favorite',
+		'mark_read' => 'Toggle read',
+		'navigation' => 'Navigation',
+		'navigation_help' => 'With the <kbd>⇧ Shift</kbd> modifier, navigation shortcuts apply on feeds.<br/>With the <kbd>Alt ⎇</kbd> modifier, navigation shortcuts apply on categories.',
+		'navigation_no_mod_help' => 'The following navigation shortcuts do not support modifiers.',
+		'next_article' => 'Open the next article',
+		'normal_view' => 'Switch to normal view',
+		'other_action' => 'Other actions',
+		'previous_article' => 'Open the previous article',
+		'reading_view' => 'Switch to reading view',
+		'rss_view' => 'Open RSS view in a new tab',
+		'see_on_website' => 'See on original website',
+		'shift_for_all_read' => '+ <kbd>Alt ⎇</kbd> to mark previous articles as read<br />+ <kbd>⇧ Shift</kbd> to mark all articles as read',
+		'skip_next_article' => 'Focus next without opening',
+		'skip_previous_article' => 'Focus previous without opening',
+		'title' => 'Shortcuts',
+		'toggle_media' => 'Play/pause media',
+		'user_filter' => 'Access user queries',
+		'user_filter_help' => 'If there is only one user query, it is used. Otherwise, queries are accessible by their number.',
+		'views' => 'Views',
+	),
+	'user' => array(
+		'articles_and_size' => '%s articles (%s)',
+		'current' => 'Current user',
+		'is_admin' => 'is administrator',
+		'users' => 'Users',
+	),
+);
diff --git a/app/i18n/en-us/feedback.php b/app/i18n/en-us/feedback.php
new file mode 100644
index 000000000..6a0efd902
--- /dev/null
+++ b/app/i18n/en-us/feedback.php
@@ -0,0 +1,134 @@
+<?php
+
+return array(
+	'access' => array(
+		'denied' => 'You don’t have permission to access this page',
+		'not_found' => 'You are looking for a page that doesn’t exist',
+	),
+	'admin' => array(
+		'optimization_complete' => 'Optimization complete',
+	),
+	'api' => array(
+		'password' => array(
+			'failed' => 'Your password cannot be modified',
+			'updated' => 'Your password has been modified',
+		),
+	),
+	'auth' => array(
+		'form' => array(
+			'not_set' => 'A problem occurred during authentication system configuration. Please try again later.',
+			'set' => 'Form is now your default authentication system.',
+		),
+		'login' => array(
+			'invalid' => 'Login is invalid',
+			'success' => 'You are connected',
+		),
+		'logout' => array(
+			'success' => 'You are disconnected',
+		),
+		'no_password_set' => 'Administrator password hasn’t been set. This feature isn’t available.',
+	),
+	'conf' => array(
+		'error' => 'An error occurred while saving configuration',
+		'query_created' => 'Query "%s" has been created.',
+		'shortcuts_updated' => 'Shortcuts have been updated',
+		'updated' => 'Configuration has been updated',
+	),
+	'extensions' => array(
+		'already_enabled' => '%s is already enabled',
+		'cannot_remove' => '%s cannot be removed',
+		'disable' => array(
+			'ko' => '%s cannot be disabled. <a href="%s">Check FreshRSS logs</a> for details.',
+			'ok' => '%s is now disabled',
+		),
+		'enable' => array(
+			'ko' => '%s cannot be enabled. <a href="%s">Check FreshRSS logs</a> for details.',
+			'ok' => '%s is now enabled',
+		),
+		'no_access' => 'You have no access on %s',
+		'not_enabled' => '%s is not enabled',
+		'not_found' => '%s does not exist',
+		'removed' => '%s removed',
+	),
+	'import_export' => array(
+		'export_no_zip_extension' => 'The ZIP extension is not present on your server. Please try to export files one by one.',
+		'feeds_imported' => 'Your feeds have been imported and will now be updated',
+		'feeds_imported_with_errors' => 'Your feeds have been imported, but some errors occurred',
+		'file_cannot_be_uploaded' => 'File cannot be uploaded!',
+		'no_zip_extension' => 'The ZIP extension is not present on your server.',
+		'zip_error' => 'An error occurred during ZIP import.',
+	),
+	'profile' => array(
+		'error' => 'Your profile cannot be modified',
+		'updated' => 'Your profile has been modified',
+	),
+	'sub' => array(
+		'actualize' => 'Updating',
+		'articles' => array(
+			'marked_read' => 'The selected articles have been marked as read.',
+			'marked_unread' => 'The articles have been marked as unread.',
+		),
+		'category' => array(
+			'created' => 'Category %s has been created.',
+			'deleted' => 'Category has been deleted.',
+			'emptied' => 'Category has been emptied',
+			'error' => 'Category cannot be updated',
+			'name_exists' => 'Category name already exists.',
+			'no_id' => 'You must specify the id of the category.',
+			'no_name' => 'Category name cannot be empty.',
+			'not_delete_default' => 'You cannot delete the default category!',
+			'not_exist' => 'The category does not exist!',
+			'over_max' => 'You have reached your limit of categories (%d)',
+			'updated' => 'Category has been updated.',
+		),
+		'feed' => array(
+			'actualized' => '<em>%s</em> has been updated',
+			'actualizeds' => 'RSS feeds have been updated',
+			'added' => 'RSS feed <em>%s</em> has been added',
+			'already_subscribed' => 'You have already subscribed to <em>%s</em>',
+			'cache_cleared' => '<em>%s</em> cache has been cleared',
+			'deleted' => 'Feed has been deleted',
+			'error' => 'Feed cannot be updated',
+			'internal_problem' => 'The newsfeed could not be added. <a href="%s">Check FreshRSS logs</a> for details. You can try force adding by appending <code>#force_feed</code> to the URL.',
+			'invalid_url' => 'URL <em>%s</em> is invalid',
+			'n_actualized' => '%d feeds have been updated',
+			'n_entries_deleted' => '%d articles have been deleted',
+			'no_refresh' => 'There are no feeds to refresh',
+			'not_added' => '<em>%s</em> could not be added',
+			'not_found' => 'Feed cannot be found',
+			'over_max' => 'You have reached your limit of feeds (%d)',
+			'reloaded' => '<em>%s</em> has been reloaded',
+			'selector_preview' => array(
+				'http_error' => 'Failed to load website content.',
+				'no_entries' => 'There are no articles in this feed. You need at least one article to create a preview.',
+				'no_feed' => 'Internal error (feed cannot be found).',
+				'no_result' => 'The selector didn\'t match anything. As a fallback the original feed text will be displayed instead.',
+				'selector_empty' => 'The selector is empty. You need to define one to create a preview.',
+			),
+			'updated' => 'Feed has been updated',
+		),
+		'purge_completed' => 'Purge completed (%d articles deleted)',
+	),
+	'update' => array(
+		'can_apply' => 'FreshRSS will now be updated to the <strong>version %s</strong>.',
+		'error' => 'The update process has encountered an error: %s',
+		'file_is_nok' => 'New <strong>version %s</strong> available, but check permissions on <em>%s</em> directory. HTTP server must have have write permission',
+		'finished' => 'Update complete!',
+		'none' => 'No update to apply',
+		'server_not_found' => 'Update server cannot be found. [%s]',
+	),
+	'user' => array(
+		'created' => array(
+			'_' => 'User %s has been created',
+			'error' => 'User %s cannot be created',
+		),
+		'deleted' => array(
+			'_' => 'User %s has been deleted',
+			'error' => 'User %s cannot be deleted',
+		),
+		'updated' => array(
+			'_' => 'User %s has been updated',
+			'error' => 'User %s has not been updated',
+		),
+	),
+);
diff --git a/app/i18n/en-us/gen.php b/app/i18n/en-us/gen.php
new file mode 100644
index 000000000..efc920d43
--- /dev/null
+++ b/app/i18n/en-us/gen.php
@@ -0,0 +1,215 @@
+<?php
+
+return array(
+	'action' => array(
+		'actualize' => 'Actualize',
+		'add' => 'Add',
+		'back' => '← Go back',
+		'back_to_rss_feeds' => '← Go back to your RSS feeds',
+		'cancel' => 'Cancel',
+		'create' => 'Create',
+		'demote' => 'Demote',
+		'disable' => 'Disable',
+		'empty' => 'Empty',
+		'enable' => 'Enable',
+		'export' => 'Export',
+		'filter' => 'Filter',
+		'import' => 'Import',
+		'manage' => 'Manage',
+		'mark_favorite' => 'Mark as favorite',
+		'mark_read' => 'Mark as read',
+		'promote' => 'Promote',
+		'purge' => 'Purge',
+		'remove' => 'Remove',
+		'see_website' => 'See website',
+		'submit' => 'Submit',
+		'truncate' => 'Delete all articles',
+		'update' => 'Update',
+	),
+	'auth' => array(
+		'accept_tos' => 'I accept the <a href="%s">Terms of Service</a>.',
+		'email' => 'Email address',
+		'keep_logged_in' => 'Keep me logged in <small>(%s days)</small>',
+		'login' => 'Login',
+		'logout' => 'Logout',
+		'password' => array(
+			'_' => 'Password',
+			'format' => '<small>At least 7 characters</small>',
+		),
+		'registration' => array(
+			'_' => 'New account',
+			'ask' => 'Create an account?',
+			'title' => 'Account creation',
+		),
+		'reset' => 'Authentication reset',
+		'username' => array(
+			'_' => 'Username',
+			'admin' => 'Administrator username',
+			'format' => '<small>Maximum 16 alphanumeric characters</small>',
+		),
+	),
+	'date' => array(
+		'Apr' => '\\A\\p\\r\\i\\l',
+		'Aug' => '\\A\\u\\g\\u\\s\\t',
+		'Dec' => '\\D\\e\\c\\e\\m\\b\\e\\r',
+		'Feb' => '\\F\\e\\b\\r\\u\\a\\r\\y',
+		'Jan' => '\\J\\a\\n\\u\\a\\r\\y',
+		'Jul' => '\\J\\u\\l\\y',
+		'Jun' => '\\J\\u\\n\\e',
+		'Mar' => '\\M\\a\\r\\c\\h',
+		'May' => '\\M\\a\\y',
+		'Nov' => '\\N\\o\\v\\e\\m\\b\\e\\r',
+		'Oct' => '\\O\\c\\t\\o\\b\\e\\r',
+		'Sep' => '\\S\\e\\p\\t\\e\\m\\b\\e\\r',
+		'apr' => 'Apr.',
+		'april' => 'April',
+		'aug' => 'Aug.',
+		'august' => 'August',
+		'before_yesterday' => 'Before yesterday',
+		'dec' => 'Dec.',
+		'december' => 'December',
+		'feb' => 'Feb.',
+		'february' => 'February',
+		'format_date' => '%s j\\<\\s\\u\\p\\>S\\<\\/\\s\\u\\p\\> Y',
+		'format_date_hour' => '%s j\\<\\s\\u\\p\\>S\\<\\/\\s\\u\\p\\> Y \\a\\t H\\:i',
+		'fri' => 'Fri',
+		'jan' => 'Jan.',
+		'january' => 'January',
+		'jul' => 'July',
+		'july' => 'July',
+		'jun' => 'June',
+		'june' => 'June',
+		'last_2_year' => 'Last two years',
+		'last_3_month' => 'Last three months',
+		'last_3_year' => 'Last three years',
+		'last_5_year' => 'Last five years',
+		'last_6_month' => 'Last six months',
+		'last_month' => 'Last month',
+		'last_week' => 'Last week',
+		'last_year' => 'Last year',
+		'mar' => 'Mar.',
+		'march' => 'March',
+		'may' => 'May',
+		'may_' => 'May',
+		'mon' => 'Mon',
+		'month' => 'months',
+		'nov' => 'Nov.',
+		'november' => 'November',
+		'oct' => 'Oct.',
+		'october' => 'October',
+		'sat' => 'Sat',
+		'sep' => 'Sept.',
+		'september' => 'September',
+		'sun' => 'Sun',
+		'thu' => 'Thu',
+		'today' => 'Today',
+		'tue' => 'Tue',
+		'wed' => 'Wed',
+		'yesterday' => 'Yesterday',
+	),
+	'dir' => 'ltr',
+	'freshrss' => array(
+		'_' => 'FreshRSS',
+		'about' => 'About FreshRSS',
+	),
+	'js' => array(
+		'category_empty' => 'Empty category',
+		'confirm_action' => 'Are you sure you want to perform this action? It cannot be canceled!',
+		'confirm_action_feed_cat' => 'Are you sure you want to perform this action? You will lose related favorites and user queries. It cannot be canceled!',
+		'feedback' => array(
+			'body_new_articles' => 'There are %%d new articles to read on FreshRSS.',
+			'request_failed' => 'A request has failed, it may have been caused by internet connection problems.',
+			'title_new_articles' => 'FreshRSS: new articles!',
+		),
+		'new_article' => 'There are new articles available, click to refresh the page.',
+		'should_be_activated' => 'JavaScript must be enabled',
+	),
+	'lang' => array(
+		'cz' => 'Čeština',
+		'de' => 'Deutsch',
+		'en' => 'English',
+		'en-us' => 'English (United States)',
+		'es' => 'Español',
+		'fr' => 'Français',
+		'he' => 'עברית',
+		'it' => 'Italiano',
+		'kr' => '한국어',
+		'nl' => 'Nederlands',
+		'oc' => 'Occitan',
+		'pt-br' => 'Português (Brasil)',
+		'ru' => 'Русский',
+		'sk' => 'Slovenčina',
+		'tr' => 'Türkçe',
+		'zh-cn' => '简体中文',
+	),
+	'menu' => array(
+		'about' => 'About',
+		'admin' => 'Administration',
+		'archiving' => 'Archiving',
+		'authentication' => 'Authentication',
+		'check_install' => 'Installation check',
+		'configuration' => 'Configuration',
+		'display' => 'Display',
+		'extensions' => 'Extensions',
+		'logs' => 'Logs',
+		'queries' => 'User queries',
+		'reading' => 'Reading',
+		'search' => 'Search words or #tags',
+		'sharing' => 'Sharing',
+		'shortcuts' => 'Shortcuts',
+		'stats' => 'Statistics',
+		'system' => 'System configuration',
+		'update' => 'Update',
+		'user_management' => 'Manage users',
+		'user_profile' => 'Profile',
+	),
+	'pagination' => array(
+		'first' => 'First',
+		'last' => 'Last',
+		'load_more' => 'Load more articles',
+		'mark_all_read' => 'Mark all as read',
+		'next' => 'Next',
+		'nothing_to_load' => 'There are no more articles',
+		'previous' => 'Previous',
+	),
+	'period' => array(
+		'days' => 'days',
+		'hours' => 'hours',
+		'months' => 'months',
+		'weeks' => 'weeks',
+		'years' => 'years',
+	),
+	'share' => array(
+		'Known' => 'Known based sites',
+		'blogotext' => 'Blogotext',
+		'diaspora' => 'Diaspora*',
+		'email' => 'Email',
+		'facebook' => 'Facebook',
+		'gnusocial' => 'GNU social',
+		'jdh' => 'Journal du hacker',
+		'lemmy' => 'Lemmy',
+		'linkedin' => 'LinkedIn',
+		'mastodon' => 'Mastodon',
+		'movim' => 'Movim',
+		'pinboard' => 'Pinboard',
+		'pocket' => 'Pocket',
+		'print' => 'Print',
+		'shaarli' => 'Shaarli',
+		'twitter' => 'Twitter',
+		'wallabag' => 'wallabag v1',
+		'wallabagv2' => 'wallabag v2',
+	),
+	'short' => array(
+		'attention' => 'Warning!',
+		'blank_to_disable' => 'Leave blank to disable',
+		'by_author' => 'By:',
+		'by_default' => 'By default',
+		'damn' => 'Blast!',
+		'default_category' => 'Uncategorized',
+		'no' => 'No',
+		'not_applicable' => 'Not available',
+		'ok' => 'Okay!',
+		'or' => 'or',
+		'yes' => 'Yes',
+	),
+);
diff --git a/app/i18n/en-us/index.php b/app/i18n/en-us/index.php
new file mode 100644
index 000000000..250e5654d
--- /dev/null
+++ b/app/i18n/en-us/index.php
@@ -0,0 +1,66 @@
+<?php
+
+return array(
+	'about' => array(
+		'_' => 'About',
+		'agpl3' => '<a href="https://www.gnu.org/licenses/agpl-3.0.html">AGPL 3</a>',
+		'bugs_reports' => 'Bug reports',
+		'credits' => 'Credits',
+		'credits_content' => 'Some design elements come from <a href="http://twitter.github.io/bootstrap/">Bootstrap</a> although FreshRSS doesn’t use this framework. <a href="https://git.gnome.org/browse/gnome-icon-theme-symbolic">Icons</a> come from <a href="https://www.gnome.org/">GNOME project</a>. <em>Open Sans</em> font police has been created by <a href="https://fonts.google.com/specimen/Open+Sans">Steve Matteson</a>. FreshRSS is based on <a href="https://github.com/marienfressinaud/MINZ">Minz</a>, a PHP framework.',
+		'freshrss_description' => 'FreshRSS is a RSS feeds aggregator to self-host like <a href="http://tontof.net/kriss/feed/">Kriss Feed</a> or <a href="https://github.com/LeedRSS/Leed">Leed</a>. It is light and easy to take in hand while being powerful and configurable tool.',
+		'github' => '<a href="https://github.com/FreshRSS/FreshRSS/issues">on Github</a>',
+		'license' => 'License',
+		'project_website' => 'Project website',
+		'title' => 'About',
+		'version' => 'Version',
+		'website' => 'Website',
+	),
+	'feed' => array(
+		'add' => 'Please add some feeds.',
+		'empty' => 'There are no articles to show.',
+		'rss_of' => 'RSS feed of %s',
+		'title' => 'Your RSS feeds',
+		'title_fav' => 'Your favorites',
+		'title_global' => 'Global view',
+	),
+	'log' => array(
+		'_' => 'Logs',
+		'clear' => 'Clear the logs',
+		'empty' => 'Log file is empty',
+		'title' => 'Logs',
+	),
+	'menu' => array(
+		'about' => 'About FreshRSS',
+		'add_query' => 'Add a query',
+		'before_one_day' => 'Before one day',
+		'before_one_week' => 'Before one week',
+		'favorites' => 'Favorites (%s)',
+		'global_view' => 'Global view',
+		'main_stream' => 'Main stream',
+		'mark_all_read' => 'Mark all as read',
+		'mark_cat_read' => 'Mark category as read',
+		'mark_feed_read' => 'Mark feed as read',
+		'mark_selection_unread' => 'Mark selection as unread',
+		'newer_first' => 'Newer first',
+		'non-starred' => 'Show non-favorites',
+		'normal_view' => 'Normal view',
+		'older_first' => 'Oldest first',
+		'queries' => 'User queries',
+		'read' => 'Show read',
+		'reader_view' => 'Reading view',
+		'rss_view' => 'RSS feed',
+		'search_short' => 'Search',
+		'starred' => 'Show favorites',
+		'stats' => 'Statistics',
+		'subscription' => 'Subscription management',
+		'tags' => 'My labels',
+		'unread' => 'Show unread',
+	),
+	'share' => 'Share',
+	'tag' => array(
+		'related' => 'Article tags',
+	),
+	'tos' => array(
+		'title' => 'Terms of Service',
+	),
+);
diff --git a/app/i18n/en-us/install.php b/app/i18n/en-us/install.php
new file mode 100644
index 000000000..048774a1e
--- /dev/null
+++ b/app/i18n/en-us/install.php
@@ -0,0 +1,123 @@
+<?php
+
+return array(
+	'action' => array(
+		'finish' => 'Complete installation',
+		'fix_errors_before' => 'Please all fix errors before continuing to the next step.',
+		'keep_install' => 'Keep previous configuration',
+		'next_step' => 'Go to the next step',
+		'reinstall' => 'Reinstall FreshRSS',
+	),
+	'auth' => array(
+		'form' => 'Web form (traditional, requires JavaScript)',
+		'http' => 'HTTP (for advanced users with HTTPS)',
+		'none' => 'None (dangerous)',
+		'password_form' => 'Password<br /><small>(for the Web-form login method)</small>',
+		'password_format' => 'At least 7 characters',
+		'type' => 'Authentication method',
+	),
+	'bdd' => array(
+		'_' => 'Database',
+		'conf' => array(
+			'_' => 'Database configuration',
+			'ko' => 'Verify your database configuration.',
+			'ok' => 'Database configuration has been saved.',
+		),
+		'host' => 'Host',
+		'password' => 'Database password',
+		'prefix' => 'Table prefix',
+		'type' => 'Type of database',
+		'username' => 'Database username',
+	),
+	'check' => array(
+		'_' => 'Checks',
+		'already_installed' => 'We have detected that FreshRSS is already installed!',
+		'cache' => array(
+			'nok' => 'Check permissions on the <em>./data/cache</em> directory. The HTTP server must have write permission.',
+			'ok' => 'Permissions on the cache directory are good.',
+		),
+		'ctype' => array(
+			'nok' => 'Cannot find the required library for character type checking (php-ctype).',
+			'ok' => 'You have the required library for character type checking (ctype).',
+		),
+		'curl' => array(
+			'nok' => 'Cannot find the cURL library (php-curl package).',
+			'ok' => 'You have the cURL library.',
+		),
+		'data' => array(
+			'nok' => 'Check permissions on the <em>./data</em> directory. The HTTP server must have write permission.',
+			'ok' => 'Permissions on the data directory are good.',
+		),
+		'dom' => array(
+			'nok' => 'Cannot find the required library to browse the DOM.',
+			'ok' => 'You have the required library to browse the DOM.',
+		),
+		'favicons' => array(
+			'nok' => 'Check permissions on the <em>./data/favicons</em> directory. The HTTP server must have write permission.',
+			'ok' => 'Permissions on the favicons directory are good.',
+		),
+		'fileinfo' => array(
+			'nok' => 'Cannot find the PHP fileinfo library (fileinfo package).',
+			'ok' => 'You have the fileinfo library.',
+		),
+		'http_referer' => array(
+			'nok' => 'Please check that you are not altering your HTTP REFERER.',
+			'ok' => 'Your HTTP REFERER is known and corresponds to your server.',
+		),
+		'json' => array(
+			'nok' => 'Cannot find the recommended library to parse JSON.',
+			'ok' => 'You have the recommended library to parse JSON.',
+		),
+		'mbstring' => array(
+			'nok' => 'Cannot find the recommended library mbstring for Unicode.',
+			'ok' => 'You have the recommended library mbstring for Unicode.',
+		),
+		'minz' => array(
+			'nok' => 'Cannot find the Minz framework.',
+			'ok' => 'You have the Minz framework.',
+		),
+		'pcre' => array(
+			'nok' => 'Cannot find the required library for regular expressions (php-pcre).',
+			'ok' => 'You have the required library for regular expressions (PCRE).',
+		),
+		'pdo' => array(
+			'nok' => 'Cannot find PDO or one of the supported drivers (pdo_mysql, pdo_sqlite, pdo_pgsql).',
+			'ok' => 'You have PDO and at least one of the supported drivers (pdo_mysql, pdo_sqlite, pdo_pgsql).',
+		),
+		'php' => array(
+			'nok' => 'Your PHP version is %s, but FreshRSS requires at least version %s.',
+			'ok' => 'Your PHP version, %s, is compatible with FreshRSS.',
+		),
+		'users' => array(
+			'nok' => 'Check permissions on the <em>./data/users</em> directory. The HTTP server must have write permissions',
+			'ok' => 'Permissions on the users directory are good.',
+		),
+		'xml' => array(
+			'nok' => 'Cannot find the required library to parse XML.',
+			'ok' => 'You have the required library to parse XML.',
+		),
+	),
+	'conf' => array(
+		'_' => 'General configuration',
+		'ok' => 'General configuration has been saved.',
+	),
+	'congratulations' => 'Congratulations!',
+	'default_user' => 'Username of the default user <small>(maximum 16 alphanumeric characters)</small>',
+	'delete_articles_after' => 'Remove articles after',
+	'fix_errors_before' => 'Please fix errors before continuing to the next step.',
+	'javascript_is_better' => 'FreshRSS is more pleasant with JavaScript enabled',
+	'js' => array(
+		'confirm_reinstall' => 'You will lose your previous configuration by reinstalling FreshRSS. Are you sure you want to continue?',
+	),
+	'language' => array(
+		'_' => 'Language',
+		'choose' => 'Choose a language for FreshRSS',
+		'defined' => 'Language has been defined.',
+	),
+	'not_deleted' => 'Something went wrong; you must delete the file <em>%s</em> manually.',
+	'ok' => 'The installation process was successful.',
+	'step' => 'step %d',
+	'steps' => 'Steps',
+	'this_is_the_end' => 'This is the end',
+	'title' => 'Installation · FreshRSS',
+);
diff --git a/app/i18n/en-us/sub.php b/app/i18n/en-us/sub.php
new file mode 100644
index 000000000..08ec8bbbc
--- /dev/null
+++ b/app/i18n/en-us/sub.php
@@ -0,0 +1,120 @@
+<?php
+
+return array(
+	'add' => 'Feed and category creation has been moved <a href=\'%s\'>here</a>. It is also accessible from the menu on the left and from the ✚ icon available on the main page.',
+	'api' => array(
+		'documentation' => 'Copy the following URL to use it within an external tool.',
+		'title' => 'API',
+	),
+	'bookmarklet' => array(
+		'documentation' => 'Drag this button to your bookmarks toolbar or right-click it and choose "Bookmark This Link". Then click the "Subscribe" button in any page you want to subscribe to.',
+		'label' => 'Subscribe',
+		'title' => 'Bookmarklet',
+	),
+	'category' => array(
+		'_' => 'Category',
+		'add' => 'Add a category',
+		'archiving' => 'Archiving',
+		'empty' => 'Empty category',
+		'information' => 'Information',
+		'position' => 'Display position',
+		'position_help' => 'To control category sort order',
+		'title' => 'Title',
+	),
+	'feed' => array(
+		'add' => 'Add a RSS feed',
+		'advanced' => 'Advanced',
+		'archiving' => 'Archiving',
+		'auth' => array(
+			'configuration' => 'Login',
+			'help' => 'Allows access to HTTP protected RSS feeds',
+			'http' => 'HTTP Authentication',
+			'password' => 'HTTP password',
+			'username' => 'HTTP username',
+		),
+		'clear_cache' => 'Always clear cache',
+		'css_help' => 'Retrieves truncated RSS feeds (caution, requires more time!)',
+		'css_path' => 'Article CSS selector on original website',
+		'description' => 'Description',
+		'empty' => 'This feed is empty. Please verify that it is still maintained.',
+		'error' => 'This feed has encountered a problem. Please verify that it is always reachable then update it.',
+		'filteractions' => array(
+			'_' => 'Filter actions',
+			'help' => 'Write one search filter per line.',
+		),
+		'information' => 'Information',
+		'keep_min' => 'Minimum number of articles to keep',
+		'maintenance' => array(
+			'clear_cache' => 'Clear cache',
+			'clear_cache_help' => 'Clear the cache for this feed.',
+			'reload_articles' => 'Reload articles',
+			'reload_articles_help' => 'Reload articles and fetch complete content if a selector is defined.',
+			'title' => 'Maintenance',
+		),
+		'moved_category_deleted' => 'When you delete a category, its feeds are automatically classified under <em>%s</em>.',
+		'mute' => 'mute',
+		'no_selected' => 'No feed selected.',
+		'number_entries' => '%d articles',
+		'priority' => array(
+			'_' => 'Visibility',
+			'archived' => 'Do not show (archived)',
+			'main_stream' => 'Show in main stream',
+			'normal' => 'Show in its category',
+		),
+		'selector_preview' => array(
+			'show_raw' => 'Show source code',
+			'show_rendered' => 'Show content',
+		),
+		'show' => array(
+			'all' => 'Show all feeds',
+			'error' => 'Show only feeds with errors',
+		),
+		'showing' => array(
+			'error' => 'Showing only feeds with errors',
+		),
+		'ssl_verify' => 'Verify SSL security',
+		'stats' => 'Statistics',
+		'think_to_add' => 'You may add some feeds.',
+		'timeout' => 'Timeout in seconds',
+		'title' => 'Title',
+		'title_add' => 'Add an RSS feed',
+		'ttl' => 'Do not automatically refresh more often than',
+		'url' => 'Feed URL',
+		'validator' => 'Check the validity of the feed',
+		'website' => 'Website URL',
+		'websub' => 'Instant notification with WebSub',
+	),
+	'firefox' => array(
+		'documentation' => 'Follow the steps described <a href="https://developer.mozilla.org/en-US/Firefox/Releases/2/Adding_feed_readers_to_Firefox#Adding_a_new_feed_reader_manually">here</a> to add FreshRSS to Firefox feed reader list.',
+		'obsolete_63' => 'From version 63 and onwards, Firefox has removed the ability to add your own subscription services that are not standalone programs.',
+		'title' => 'Firefox feed reader',
+	),
+	'import_export' => array(
+		'export' => 'Export',
+		'export_labelled' => 'Export your labeled articles',
+		'export_opml' => 'Export list of feeds (OPML)',
+		'export_starred' => 'Export your favorites',
+		'feed_list' => 'List of %s articles',
+		'file_to_import' => 'File to import<br />(OPML, JSON or ZIP)',
+		'file_to_import_no_zip' => 'File to import<br />(OPML or JSON)',
+		'import' => 'Import',
+		'starred_list' => 'List of favorite articles',
+		'title' => 'Import / export',
+	),
+	'menu' => array(
+		'add' => 'Add a feed or category',
+		'add_feed' => 'Add a feed',
+		'bookmark' => 'Subscribe (FreshRSS bookmark)',
+		'import_export' => 'Import / export',
+		'subscription_management' => 'Subscription management',
+		'subscription_tools' => 'Subscription tools',
+	),
+	'title' => array(
+		'_' => 'Subscription management',
+		'add' => 'Add a feed or category',
+		'add_category' => 'Add a category',
+		'add_feed' => 'Add a feed',
+		'feed_management' => 'RSS feeds management',
+		'subscription_tools' => 'Subscription tools',
+	),
+);
diff --git a/app/i18n/en-us/user.php b/app/i18n/en-us/user.php
new file mode 100644
index 000000000..1189029c7
--- /dev/null
+++ b/app/i18n/en-us/user.php
@@ -0,0 +1,44 @@
+<?php
+
+return array(
+	'email' => array(
+		'feedback' => array(
+			'invalid' => 'This email address is invalid.',
+			'required' => 'An email address is required.',
+		),
+		'validation' => array(
+			'change_email' => 'You can change your email address <a href="%s">on the profile page</a>.',
+			'email_sent_to' => 'We sent you an email at <strong>%s</strong>, please follow its instructions to validate your address.',
+			'feedback' => array(
+				'email_failed' => 'We couldn’t send you an email because of a server configuration error.',
+				'email_sent' => 'An email has been sent to your address.',
+				'error' => 'This email address validation failed.',
+				'ok' => 'This email address has been validated.',
+				'unneccessary' => 'This email address was already validated.',
+				'wrong_token' => 'This email address failed to be validated due to a wrong token.',
+			),
+			'need_to' => 'You need to validate your email address before being able to use %s.',
+			'resend_email' => 'Resend the email',
+			'title' => 'Email address validation',
+		),
+	),
+	'mailer' => array(
+		'email_need_validation' => array(
+			'body' => 'You’ve just registered on %s, but you still need to validate your email address. For that, just follow the link:',
+			'title' => 'You need to validate your account',
+			'welcome' => 'Welcome %s,',
+		),
+	),
+	'password' => array(
+		'invalid' => 'The password is invalid.',
+	),
+	'tos' => array(
+		'feedback' => array(
+			'invalid' => 'You must accept the Terms of Service to be able to register.',
+		),
+	),
+	'username' => array(
+		'invalid' => 'This username is invalid.',
+		'taken' => 'This username, %s, is taken.',
+	),
+);
diff --git a/app/i18n/en/feedback.php b/app/i18n/en/feedback.php
index 6d6796dda..5bd5469ca 100644
--- a/app/i18n/en/feedback.php
+++ b/app/i18n/en/feedback.php
@@ -16,7 +16,7 @@ return array(
 	),
 	'auth' => array(
 		'form' => array(
-			'not_set' => 'A problem occured during authentication system configuration. Please retry later.',
+			'not_set' => 'A problem occurred during authentication system configuration. Please retry later.',
 			'set' => 'Form is now your default authentication system.',
 		),
 		'login' => array(
@@ -56,7 +56,7 @@ return array(
 		'feeds_imported_with_errors' => 'Your feeds have been imported, but some errors occurred',
 		'file_cannot_be_uploaded' => 'File cannot be uploaded!',
 		'no_zip_extension' => 'ZIP extension is not present on your server.',
-		'zip_error' => 'An error occured during ZIP import.',
+		'zip_error' => 'An error occurred during ZIP import.',
 	),
 	'profile' => array(
 		'error' => 'Your profile cannot be modified',
diff --git a/app/i18n/en/gen.php b/app/i18n/en/gen.php
index 6f2101506..98c94c542 100644
--- a/app/i18n/en/gen.php
+++ b/app/i18n/en/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',
 		'de' => 'Deutsch',
 		'en' => 'English',
+		'en-us' => 'English (United States)',
 		'es' => 'Español',
 		'fr' => 'Français',
 		'he' => 'עברית',
diff --git a/app/i18n/es/gen.php b/app/i18n/es/gen.php
index 760f8e246..48299c932 100755
--- a/app/i18n/es/gen.php
+++ b/app/i18n/es/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',
 		'de' => 'Deutsch',
 		'en' => 'English',
+		'en-us' => 'English (United States)',
 		'es' => 'Español',
 		'fr' => 'Français',
 		'he' => 'עברית',
diff --git a/app/i18n/fr/gen.php b/app/i18n/fr/gen.php
index cb61b1c2f..1cdc0d6ff 100644
--- a/app/i18n/fr/gen.php
+++ b/app/i18n/fr/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',
 		'de' => 'Deutsch',
 		'en' => 'English',
+		'en-us' => 'English (United States)',
 		'es' => 'Español',
 		'fr' => 'Français',
 		'he' => 'עברית',
diff --git a/app/i18n/he/gen.php b/app/i18n/he/gen.php
index 862c00f64..7ecc64509 100644
--- a/app/i18n/he/gen.php
+++ b/app/i18n/he/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',	// TODO - Translation
 		'de' => 'Deutsch',	// TODO - Translation
 		'en' => 'English',	// TODO - Translation
+		'en-us' => 'English (United States)',
 		'es' => 'Español',	// TODO - Translation
 		'fr' => 'Français',	// TODO - Translation
 		'he' => 'עברית',	// TODO - Translation
diff --git a/app/i18n/it/gen.php b/app/i18n/it/gen.php
index d23d70b1d..4d9f126de 100644
--- a/app/i18n/it/gen.php
+++ b/app/i18n/it/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',	// TODO - Translation
 		'de' => 'Deutsch',	// TODO - Translation
 		'en' => 'English',	// TODO - Translation
+		'en-us' => 'English (United States)',
 		'es' => 'Español',	// TODO - Translation
 		'fr' => 'Français',	// TODO - Translation
 		'he' => 'עברית',	// TODO - Translation
diff --git a/app/i18n/kr/gen.php b/app/i18n/kr/gen.php
index 1d245aa02..394f0bbd6 100644
--- a/app/i18n/kr/gen.php
+++ b/app/i18n/kr/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',
 		'de' => 'Deutsch',
 		'en' => 'English',
+		'en-us' => 'English (United States)',
 		'es' => 'Español',
 		'fr' => 'Français',
 		'he' => 'עברית',
diff --git a/app/i18n/nl/gen.php b/app/i18n/nl/gen.php
index a63addbbb..ca15a8ec0 100644
--- a/app/i18n/nl/gen.php
+++ b/app/i18n/nl/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',
 		'de' => 'Deutsch',
 		'en' => 'English',
+		'en-us' => 'English (United States)',
 		'es' => 'Español',
 		'fr' => 'Français',
 		'he' => 'עברית',
diff --git a/app/i18n/oc/gen.php b/app/i18n/oc/gen.php
index 2c9255545..c140e629b 100644
--- a/app/i18n/oc/gen.php
+++ b/app/i18n/oc/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',
 		'de' => 'Deutsch',
 		'en' => 'English',
+		'en-us' => 'English (United States)',
 		'es' => 'Español',
 		'fr' => 'Français',
 		'he' => 'עברית',
diff --git a/app/i18n/pt-br/gen.php b/app/i18n/pt-br/gen.php
index 4504e735d..4b81fcd24 100644
--- a/app/i18n/pt-br/gen.php
+++ b/app/i18n/pt-br/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',
 		'de' => 'Deutsch',
 		'en' => 'English',
+		'en-us' => 'English (United States)',
 		'es' => 'Español',
 		'fr' => 'Français',
 		'he' => 'עברית',
diff --git a/app/i18n/ru/feedback.php b/app/i18n/ru/feedback.php
index dbd6a7f52..d0f0cc669 100644
--- a/app/i18n/ru/feedback.php
+++ b/app/i18n/ru/feedback.php
@@ -16,7 +16,7 @@ return array(
 	),
 	'auth' => array(
 		'form' => array(
-			'not_set' => 'A problem occured during authentication system configuration. Please retry later.',	// TODO - Translation
+			'not_set' => 'A problem occurred during authentication system configuration. Please retry later.',	// TODO - Translation
 			'set' => 'Form is now your default authentication system.',	// TODO - Translation
 		),
 		'login' => array(
@@ -56,7 +56,7 @@ return array(
 		'feeds_imported_with_errors' => 'Your feeds have been imported but some errors occurred',
 		'file_cannot_be_uploaded' => 'File cannot be uploaded!',	// TODO - Translation
 		'no_zip_extension' => 'ZIP extension is not present on your server.',	// TODO - Translation
-		'zip_error' => 'An error occured during ZIP import.',	// TODO - Translation
+		'zip_error' => 'An error occurred during ZIP import.',	// TODO - Translation
 	),
 	'profile' => array(
 		'error' => 'Your profile cannot be modified',	// TODO - Translation
diff --git a/app/i18n/ru/gen.php b/app/i18n/ru/gen.php
index 74bc63e2c..b23eb4237 100644
--- a/app/i18n/ru/gen.php
+++ b/app/i18n/ru/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',	// TODO - Translation
 		'de' => 'Deutsch',	// TODO - Translation
 		'en' => 'English',	// TODO - Translation
+		'en-us' => 'English (United States)',
 		'es' => 'Español',	// TODO - Translation
 		'fr' => 'Français',	// TODO - Translation
 		'he' => 'עברית',	// TODO - Translation
diff --git a/app/i18n/sk/gen.php b/app/i18n/sk/gen.php
index 21cb8f3b8..30c5e8d80 100644
--- a/app/i18n/sk/gen.php
+++ b/app/i18n/sk/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',
 		'de' => 'Deutsch',
 		'en' => 'English',
+		'en-us' => 'English (United States)',
 		'es' => 'Español',
 		'fr' => 'Français',
 		'he' => 'עברית',
diff --git a/app/i18n/tr/gen.php b/app/i18n/tr/gen.php
index c4f9727d8..164d3f0f7 100644
--- a/app/i18n/tr/gen.php
+++ b/app/i18n/tr/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',	// TODO - Translation
 		'de' => 'Deutsch',	// TODO - Translation
 		'en' => 'English',	// TODO - Translation
+		'en-us' => 'English (United States)',
 		'es' => 'Español',	// TODO - Translation
 		'fr' => 'Français',	// TODO - Translation
 		'he' => 'עברית',	// TODO - Translation
diff --git a/app/i18n/zh-cn/gen.php b/app/i18n/zh-cn/gen.php
index 923e1f5bd..4bf73ce6f 100644
--- a/app/i18n/zh-cn/gen.php
+++ b/app/i18n/zh-cn/gen.php
@@ -128,6 +128,7 @@ return array(
 		'cz' => 'Čeština',
 		'de' => 'Deutsch',
 		'en' => 'English',
+		'en-us' => 'English (United States)',
 		'es' => 'Español',
 		'fr' => 'Français',
 		'he' => 'עברית',
diff --git a/cli/i18n/I18nData.php b/cli/i18n/I18nData.php
index 5071c9be9..73a731245 100644
--- a/cli/i18n/I18nData.php
+++ b/cli/i18n/I18nData.php
@@ -229,6 +229,25 @@ class I18nData {
 		$this->ignore[$language][] = $key;
 	}
 
+	/**
+	 *Ignore all unmodified keys from a language, or reverse it.
+	 *
+	 * @param string $language
+	 * @param boolean $reverse
+	 */
+	public function ignore_unmodified($language, $reverse = false) {
+		$my_language = $this->getLanguage($language);
+		foreach ($this->getReferenceLanguage() as $file => $ref_language) {
+			foreach ($ref_language as $key => $ref_value) {
+				if (array_key_exists($key, $my_language[$file])) {
+					if($ref_value == $my_language[$file][$key]) {
+						$this->ignore($key, $language, $reverse);
+					}
+				}
+			}
+		}
+	}
+
 	public function getLanguage($language) {
 		return $this->data[$language];
 	}
diff --git a/cli/i18n/ignore/cz.php b/cli/i18n/ignore/cz.php
index 1c987d8b3..4ce908b82 100644
--- a/cli/i18n/ignore/cz.php
+++ b/cli/i18n/ignore/cz.php
@@ -2,4 +2,5 @@
 
 return array(
 	'gen.dir',
+	'gen.lang.en-us',
 );
diff --git a/cli/i18n/ignore/de.php b/cli/i18n/ignore/de.php
index 1c987d8b3..4ce908b82 100644
--- a/cli/i18n/ignore/de.php
+++ b/cli/i18n/ignore/de.php
@@ -2,4 +2,5 @@
 
 return array(
 	'gen.dir',
+	'gen.lang.en-us',
 );
diff --git a/cli/i18n/ignore/en-us.php b/cli/i18n/ignore/en-us.php
new file mode 100644
index 000000000..bba4be829
--- /dev/null
+++ b/cli/i18n/ignore/en-us.php
@@ -0,0 +1,686 @@
+<?php
+
+return array(
+	'admin.auth.allow_anonymous_refresh',
+	'admin.auth.api_enabled',
+	'admin.auth.form',
+	'admin.auth.http',
+	'admin.auth.none',
+	'admin.auth.title',
+	'admin.auth.title_reset',
+	'admin.auth.token',
+	'admin.auth.token_help',
+	'admin.auth.type',
+	'admin.auth.unsafe_autologin',
+	'admin.check_install.categories.nok',
+	'admin.check_install.connection.nok',
+	'admin.check_install.ctype.nok',
+	'admin.check_install.ctype.ok',
+	'admin.check_install.curl.nok',
+	'admin.check_install.curl.ok',
+	'admin.check_install.database',
+	'admin.check_install.dom.nok',
+	'admin.check_install.dom.ok',
+	'admin.check_install.entries.nok',
+	'admin.check_install.feeds.nok',
+	'admin.check_install.fileinfo.nok',
+	'admin.check_install.fileinfo.ok',
+	'admin.check_install.files',
+	'admin.check_install.json.nok',
+	'admin.check_install.minz.nok',
+	'admin.check_install.minz.ok',
+	'admin.check_install.pcre.nok',
+	'admin.check_install.pcre.ok',
+	'admin.check_install.pdo.nok',
+	'admin.check_install.pdo.ok',
+	'admin.check_install.php._',
+	'admin.check_install.php.nok',
+	'admin.check_install.tables.nok',
+	'admin.check_install.tables.ok',
+	'admin.extensions.author',
+	'admin.extensions.community',
+	'admin.extensions.description',
+	'admin.extensions.disabled',
+	'admin.extensions.empty_list',
+	'admin.extensions.enabled',
+	'admin.extensions.latest',
+	'admin.extensions.name',
+	'admin.extensions.no_configure_view',
+	'admin.extensions.system._',
+	'admin.extensions.title',
+	'admin.extensions.update',
+	'admin.extensions.user',
+	'admin.extensions.version',
+	'admin.stats._',
+	'admin.stats.all_feeds',
+	'admin.stats.category',
+	'admin.stats.entry_count',
+	'admin.stats.entry_per_category',
+	'admin.stats.entry_per_day',
+	'admin.stats.entry_per_day_of_week',
+	'admin.stats.entry_per_hour',
+	'admin.stats.entry_per_month',
+	'admin.stats.entry_repartition',
+	'admin.stats.feed',
+	'admin.stats.feed_per_category',
+	'admin.stats.idle',
+	'admin.stats.main',
+	'admin.stats.main_stream',
+	'admin.stats.menu.idle',
+	'admin.stats.menu.main',
+	'admin.stats.menu.repartition',
+	'admin.stats.number_entries',
+	'admin.stats.percent_of_total',
+	'admin.stats.repartition',
+	'admin.stats.status_read',
+	'admin.stats.status_total',
+	'admin.stats.status_unread',
+	'admin.stats.title',
+	'admin.stats.top_feed',
+	'admin.system._',
+	'admin.system.auto-update-url',
+	'admin.system.cookie-duration.help',
+	'admin.system.cookie-duration.number',
+	'admin.system.instance-name',
+	'admin.system.registration.help',
+	'admin.system.registration.number',
+	'admin.update._',
+	'admin.update.apply',
+	'admin.update.check',
+	'admin.update.current_version',
+	'admin.update.last',
+	'admin.update.none',
+	'admin.update.title',
+	'admin.user.admin',
+	'admin.user.article_count',
+	'admin.user.articles_and_size',
+	'admin.user.back_to_manage',
+	'admin.user.create',
+	'admin.user.database_size',
+	'admin.user.delete_users',
+	'admin.user.email',
+	'admin.user.enabled',
+	'admin.user.feed_count',
+	'admin.user.is_admin',
+	'admin.user.language',
+	'admin.user.last_user_activity',
+	'admin.user.list',
+	'admin.user.number',
+	'admin.user.numbers',
+	'admin.user.password_form',
+	'admin.user.password_format',
+	'admin.user.selected',
+	'admin.user.title',
+	'admin.user.update_users',
+	'admin.user.user_list',
+	'admin.user.username',
+	'admin.user.users',
+	'conf.archiving._',
+	'conf.archiving.delete_after',
+	'conf.archiving.exception',
+	'conf.archiving.keep_labels',
+	'conf.archiving.keep_max',
+	'conf.archiving.keep_period',
+	'conf.archiving.maintenance',
+	'conf.archiving.policy',
+	'conf.archiving.policy_warning',
+	'conf.archiving.purge_now',
+	'conf.archiving.title',
+	'conf.archiving.ttl',
+	'conf.display._',
+	'conf.display.icon.bottom_line',
+	'conf.display.icon.display_authors',
+	'conf.display.icon.entry',
+	'conf.display.icon.publication_date',
+	'conf.display.icon.related_tags',
+	'conf.display.icon.sharing',
+	'conf.display.icon.top_line',
+	'conf.display.language',
+	'conf.display.notif_html5.seconds',
+	'conf.display.notif_html5.timeout',
+	'conf.display.show_nav_buttons',
+	'conf.display.theme',
+	'conf.display.title',
+	'conf.display.width.content',
+	'conf.display.width.medium',
+	'conf.profile._',
+	'conf.profile.api',
+	'conf.profile.delete._',
+	'conf.profile.delete.warn',
+	'conf.profile.email',
+	'conf.profile.password_api',
+	'conf.profile.password_form',
+	'conf.profile.password_format',
+	'conf.profile.title',
+	'conf.query._',
+	'conf.query.deprecated',
+	'conf.query.display',
+	'conf.query.filter',
+	'conf.query.get_all',
+	'conf.query.get_category',
+	'conf.query.get_feed',
+	'conf.query.no_filter',
+	'conf.query.none',
+	'conf.query.number',
+	'conf.query.order_asc',
+	'conf.query.order_desc',
+	'conf.query.remove',
+	'conf.query.search',
+	'conf.query.state_0',
+	'conf.query.state_1',
+	'conf.query.state_12',
+	'conf.query.state_13',
+	'conf.query.state_14',
+	'conf.query.state_15',
+	'conf.query.state_2',
+	'conf.query.state_3',
+	'conf.query.title',
+	'conf.reading._',
+	'conf.reading.after_onread',
+	'conf.reading.always_show_favorites',
+	'conf.reading.articles_per_page',
+	'conf.reading.auto_remove_article',
+	'conf.reading.confirm_enabled',
+	'conf.reading.display_articles_unfolded',
+	'conf.reading.display_categories_unfolded',
+	'conf.reading.hide_read_feeds',
+	'conf.reading.img_with_lazyload',
+	'conf.reading.jump_next',
+	'conf.reading.mark_updated_article_unread',
+	'conf.reading.read.scroll',
+	'conf.reading.read.upon_reception',
+	'conf.reading.show._',
+	'conf.reading.show.active_category',
+	'conf.reading.show.adaptive',
+	'conf.reading.show.all_articles',
+	'conf.reading.show.all_categories',
+	'conf.reading.show.no_category',
+	'conf.reading.show.unread',
+	'conf.reading.sides_close_article',
+	'conf.reading.sort._',
+	'conf.reading.sort.newer_first',
+	'conf.reading.sort.older_first',
+	'conf.reading.sticky_post',
+	'conf.reading.title',
+	'conf.reading.view.default',
+	'conf.reading.view.global',
+	'conf.reading.view.normal',
+	'conf.reading.view.reader',
+	'conf.sharing._',
+	'conf.sharing.add',
+	'conf.sharing.blogotext',
+	'conf.sharing.diaspora',
+	'conf.sharing.email',
+	'conf.sharing.facebook',
+	'conf.sharing.more_information',
+	'conf.sharing.print',
+	'conf.sharing.remove',
+	'conf.sharing.shaarli',
+	'conf.sharing.share_name',
+	'conf.sharing.share_url',
+	'conf.sharing.title',
+	'conf.sharing.twitter',
+	'conf.sharing.wallabag',
+	'conf.shortcut._',
+	'conf.shortcut.article_action',
+	'conf.shortcut.auto_share',
+	'conf.shortcut.auto_share_help',
+	'conf.shortcut.close_dropdown',
+	'conf.shortcut.collapse_article',
+	'conf.shortcut.first_article',
+	'conf.shortcut.focus_search',
+	'conf.shortcut.global_view',
+	'conf.shortcut.help',
+	'conf.shortcut.javascript',
+	'conf.shortcut.last_article',
+	'conf.shortcut.load_more',
+	'conf.shortcut.mark_read',
+	'conf.shortcut.navigation',
+	'conf.shortcut.navigation_help',
+	'conf.shortcut.navigation_no_mod_help',
+	'conf.shortcut.next_article',
+	'conf.shortcut.normal_view',
+	'conf.shortcut.other_action',
+	'conf.shortcut.previous_article',
+	'conf.shortcut.reading_view',
+	'conf.shortcut.rss_view',
+	'conf.shortcut.see_on_website',
+	'conf.shortcut.shift_for_all_read',
+	'conf.shortcut.skip_next_article',
+	'conf.shortcut.skip_previous_article',
+	'conf.shortcut.title',
+	'conf.shortcut.toggle_media',
+	'conf.shortcut.user_filter',
+	'conf.shortcut.user_filter_help',
+	'conf.shortcut.views',
+	'conf.user.articles_and_size',
+	'conf.user.current',
+	'conf.user.is_admin',
+	'conf.user.users',
+	'feedback.access.denied',
+	'feedback.admin.optimization_complete',
+	'feedback.api.password.failed',
+	'feedback.api.password.updated',
+	'feedback.auth.form.set',
+	'feedback.auth.login.invalid',
+	'feedback.auth.login.success',
+	'feedback.auth.logout.success',
+	'feedback.auth.no_password_set',
+	'feedback.conf.query_created',
+	'feedback.conf.shortcuts_updated',
+	'feedback.conf.updated',
+	'feedback.extensions.already_enabled',
+	'feedback.extensions.cannot_remove',
+	'feedback.extensions.disable.ko',
+	'feedback.extensions.disable.ok',
+	'feedback.extensions.enable.ko',
+	'feedback.extensions.enable.ok',
+	'feedback.extensions.no_access',
+	'feedback.extensions.not_enabled',
+	'feedback.extensions.not_found',
+	'feedback.extensions.removed',
+	'feedback.import_export.feeds_imported',
+	'feedback.import_export.feeds_imported_with_errors',
+	'feedback.import_export.file_cannot_be_uploaded',
+	'feedback.import_export.zip_error',
+	'feedback.profile.error',
+	'feedback.profile.updated',
+	'feedback.sub.actualize',
+	'feedback.sub.articles.marked_read',
+	'feedback.sub.articles.marked_unread',
+	'feedback.sub.category.created',
+	'feedback.sub.category.deleted',
+	'feedback.sub.category.emptied',
+	'feedback.sub.category.error',
+	'feedback.sub.category.name_exists',
+	'feedback.sub.category.no_id',
+	'feedback.sub.category.no_name',
+	'feedback.sub.category.not_delete_default',
+	'feedback.sub.category.not_exist',
+	'feedback.sub.category.over_max',
+	'feedback.sub.category.updated',
+	'feedback.sub.feed.actualized',
+	'feedback.sub.feed.actualizeds',
+	'feedback.sub.feed.added',
+	'feedback.sub.feed.already_subscribed',
+	'feedback.sub.feed.cache_cleared',
+	'feedback.sub.feed.deleted',
+	'feedback.sub.feed.error',
+	'feedback.sub.feed.internal_problem',
+	'feedback.sub.feed.invalid_url',
+	'feedback.sub.feed.n_actualized',
+	'feedback.sub.feed.n_entries_deleted',
+	'feedback.sub.feed.not_added',
+	'feedback.sub.feed.not_found',
+	'feedback.sub.feed.over_max',
+	'feedback.sub.feed.reloaded',
+	'feedback.sub.feed.selector_preview.http_error',
+	'feedback.sub.feed.selector_preview.no_entries',
+	'feedback.sub.feed.selector_preview.no_result',
+	'feedback.sub.feed.selector_preview.selector_empty',
+	'feedback.sub.feed.updated',
+	'feedback.sub.purge_completed',
+	'feedback.update.can_apply',
+	'feedback.update.error',
+	'feedback.update.none',
+	'feedback.update.server_not_found',
+	'feedback.user.created._',
+	'feedback.user.created.error',
+	'feedback.user.deleted._',
+	'feedback.user.deleted.error',
+	'feedback.user.updated._',
+	'feedback.user.updated.error',
+	'gen.action.actualize',
+	'gen.action.add',
+	'gen.action.back',
+	'gen.action.back_to_rss_feeds',
+	'gen.action.cancel',
+	'gen.action.create',
+	'gen.action.demote',
+	'gen.action.disable',
+	'gen.action.empty',
+	'gen.action.enable',
+	'gen.action.export',
+	'gen.action.filter',
+	'gen.action.import',
+	'gen.action.manage',
+	'gen.action.mark_read',
+	'gen.action.promote',
+	'gen.action.purge',
+	'gen.action.remove',
+	'gen.action.see_website',
+	'gen.action.submit',
+	'gen.action.truncate',
+	'gen.action.update',
+	'gen.auth.accept_tos',
+	'gen.auth.email',
+	'gen.auth.keep_logged_in',
+	'gen.auth.login',
+	'gen.auth.logout',
+	'gen.auth.password._',
+	'gen.auth.password.format',
+	'gen.auth.registration._',
+	'gen.auth.registration.ask',
+	'gen.auth.registration.title',
+	'gen.auth.reset',
+	'gen.auth.username._',
+	'gen.auth.username.admin',
+	'gen.auth.username.format',
+	'gen.date.Apr',
+	'gen.date.Aug',
+	'gen.date.Dec',
+	'gen.date.Feb',
+	'gen.date.Jan',
+	'gen.date.Jul',
+	'gen.date.Jun',
+	'gen.date.Mar',
+	'gen.date.May',
+	'gen.date.Nov',
+	'gen.date.Oct',
+	'gen.date.Sep',
+	'gen.date.apr',
+	'gen.date.april',
+	'gen.date.aug',
+	'gen.date.august',
+	'gen.date.before_yesterday',
+	'gen.date.dec',
+	'gen.date.december',
+	'gen.date.feb',
+	'gen.date.february',
+	'gen.date.format_date',
+	'gen.date.format_date_hour',
+	'gen.date.fri',
+	'gen.date.jan',
+	'gen.date.january',
+	'gen.date.jul',
+	'gen.date.july',
+	'gen.date.jun',
+	'gen.date.june',
+	'gen.date.last_2_year',
+	'gen.date.last_3_month',
+	'gen.date.last_3_year',
+	'gen.date.last_5_year',
+	'gen.date.last_6_month',
+	'gen.date.last_month',
+	'gen.date.last_week',
+	'gen.date.last_year',
+	'gen.date.mar',
+	'gen.date.march',
+	'gen.date.may',
+	'gen.date.may_',
+	'gen.date.mon',
+	'gen.date.month',
+	'gen.date.nov',
+	'gen.date.november',
+	'gen.date.oct',
+	'gen.date.october',
+	'gen.date.sat',
+	'gen.date.sep',
+	'gen.date.september',
+	'gen.date.sun',
+	'gen.date.thu',
+	'gen.date.today',
+	'gen.date.tue',
+	'gen.date.wed',
+	'gen.date.yesterday',
+	'gen.dir',
+	'gen.freshrss._',
+	'gen.freshrss.about',
+	'gen.js.category_empty',
+	'gen.js.feedback.body_new_articles',
+	'gen.js.feedback.title_new_articles',
+	'gen.js.should_be_activated',
+	'gen.lang.cz',
+	'gen.lang.de',
+	'gen.lang.en',
+	'gen.lang.en-us',
+	'gen.lang.es',
+	'gen.lang.fr',
+	'gen.lang.he',
+	'gen.lang.it',
+	'gen.lang.kr',
+	'gen.lang.nl',
+	'gen.lang.oc',
+	'gen.lang.pt-br',
+	'gen.lang.ru',
+	'gen.lang.sk',
+	'gen.lang.tr',
+	'gen.lang.zh-cn',
+	'gen.menu.about',
+	'gen.menu.admin',
+	'gen.menu.archiving',
+	'gen.menu.authentication',
+	'gen.menu.configuration',
+	'gen.menu.display',
+	'gen.menu.extensions',
+	'gen.menu.logs',
+	'gen.menu.queries',
+	'gen.menu.reading',
+	'gen.menu.search',
+	'gen.menu.sharing',
+	'gen.menu.shortcuts',
+	'gen.menu.stats',
+	'gen.menu.system',
+	'gen.menu.update',
+	'gen.menu.user_management',
+	'gen.menu.user_profile',
+	'gen.pagination.first',
+	'gen.pagination.last',
+	'gen.pagination.load_more',
+	'gen.pagination.mark_all_read',
+	'gen.pagination.next',
+	'gen.pagination.nothing_to_load',
+	'gen.pagination.previous',
+	'gen.period.days',
+	'gen.period.hours',
+	'gen.period.months',
+	'gen.period.weeks',
+	'gen.period.years',
+	'gen.share.Known',
+	'gen.share.blogotext',
+	'gen.share.diaspora',
+	'gen.share.email',
+	'gen.share.facebook',
+	'gen.share.gnusocial',
+	'gen.share.jdh',
+	'gen.share.lemmy',
+	'gen.share.linkedin',
+	'gen.share.mastodon',
+	'gen.share.movim',
+	'gen.share.pinboard',
+	'gen.share.pocket',
+	'gen.share.print',
+	'gen.share.shaarli',
+	'gen.share.twitter',
+	'gen.share.wallabag',
+	'gen.share.wallabagv2',
+	'gen.short.attention',
+	'gen.short.blank_to_disable',
+	'gen.short.by_author',
+	'gen.short.by_default',
+	'gen.short.damn',
+	'gen.short.default_category',
+	'gen.short.no',
+	'gen.short.not_applicable',
+	'gen.short.or',
+	'gen.short.yes',
+	'index.about._',
+	'index.about.agpl3',
+	'index.about.credits',
+	'index.about.credits_content',
+	'index.about.freshrss_description',
+	'index.about.github',
+	'index.about.license',
+	'index.about.project_website',
+	'index.about.title',
+	'index.about.version',
+	'index.about.website',
+	'index.feed.rss_of',
+	'index.feed.title',
+	'index.feed.title_global',
+	'index.log._',
+	'index.log.clear',
+	'index.log.empty',
+	'index.log.title',
+	'index.menu.about',
+	'index.menu.add_query',
+	'index.menu.before_one_day',
+	'index.menu.before_one_week',
+	'index.menu.global_view',
+	'index.menu.main_stream',
+	'index.menu.mark_all_read',
+	'index.menu.mark_cat_read',
+	'index.menu.mark_feed_read',
+	'index.menu.mark_selection_unread',
+	'index.menu.newer_first',
+	'index.menu.normal_view',
+	'index.menu.older_first',
+	'index.menu.queries',
+	'index.menu.read',
+	'index.menu.reader_view',
+	'index.menu.rss_view',
+	'index.menu.search_short',
+	'index.menu.stats',
+	'index.menu.tags',
+	'index.menu.unread',
+	'index.share',
+	'index.tag.related',
+	'index.tos.title',
+	'install.action.finish',
+	'install.action.keep_install',
+	'install.action.next_step',
+	'install.action.reinstall',
+	'install.auth.form',
+	'install.auth.http',
+	'install.auth.none',
+	'install.auth.password_form',
+	'install.auth.password_format',
+	'install.auth.type',
+	'install.bdd._',
+	'install.bdd.conf._',
+	'install.bdd.conf.ok',
+	'install.bdd.host',
+	'install.bdd.password',
+	'install.bdd.prefix',
+	'install.bdd.type',
+	'install.bdd.username',
+	'install.check._',
+	'install.check.already_installed',
+	'install.check.ctype.ok',
+	'install.check.curl.nok',
+	'install.check.curl.ok',
+	'install.check.dom.ok',
+	'install.check.fileinfo.nok',
+	'install.check.fileinfo.ok',
+	'install.check.http_referer.nok',
+	'install.check.http_referer.ok',
+	'install.check.mbstring.nok',
+	'install.check.mbstring.ok',
+	'install.check.minz.nok',
+	'install.check.minz.ok',
+	'install.check.pcre.ok',
+	'install.check.pdo.nok',
+	'install.check.pdo.ok',
+	'install.check.xml.nok',
+	'install.check.xml.ok',
+	'install.conf._',
+	'install.conf.ok',
+	'install.congratulations',
+	'install.default_user',
+	'install.delete_articles_after',
+	'install.javascript_is_better',
+	'install.js.confirm_reinstall',
+	'install.language._',
+	'install.language.choose',
+	'install.language.defined',
+	'install.not_deleted',
+	'install.ok',
+	'install.step',
+	'install.steps',
+	'install.this_is_the_end',
+	'install.title',
+	'sub.add',
+	'sub.api.documentation',
+	'sub.api.title',
+	'sub.bookmarklet.label',
+	'sub.bookmarklet.title',
+	'sub.category._',
+	'sub.category.add',
+	'sub.category.archiving',
+	'sub.category.empty',
+	'sub.category.information',
+	'sub.category.position',
+	'sub.category.position_help',
+	'sub.category.title',
+	'sub.feed.add',
+	'sub.feed.advanced',
+	'sub.feed.archiving',
+	'sub.feed.auth.configuration',
+	'sub.feed.auth.help',
+	'sub.feed.auth.http',
+	'sub.feed.auth.password',
+	'sub.feed.auth.username',
+	'sub.feed.clear_cache',
+	'sub.feed.css_help',
+	'sub.feed.css_path',
+	'sub.feed.description',
+	'sub.feed.empty',
+	'sub.feed.error',
+	'sub.feed.filteractions._',
+	'sub.feed.filteractions.help',
+	'sub.feed.information',
+	'sub.feed.keep_min',
+	'sub.feed.maintenance.clear_cache',
+	'sub.feed.maintenance.clear_cache_help',
+	'sub.feed.maintenance.reload_articles',
+	'sub.feed.maintenance.reload_articles_help',
+	'sub.feed.maintenance.title',
+	'sub.feed.moved_category_deleted',
+	'sub.feed.mute',
+	'sub.feed.no_selected',
+	'sub.feed.number_entries',
+	'sub.feed.priority._',
+	'sub.feed.priority.archived',
+	'sub.feed.priority.main_stream',
+	'sub.feed.priority.normal',
+	'sub.feed.selector_preview.show_raw',
+	'sub.feed.selector_preview.show_rendered',
+	'sub.feed.show.all',
+	'sub.feed.ssl_verify',
+	'sub.feed.stats',
+	'sub.feed.think_to_add',
+	'sub.feed.timeout',
+	'sub.feed.title',
+	'sub.feed.ttl',
+	'sub.feed.url',
+	'sub.feed.validator',
+	'sub.feed.website',
+	'sub.feed.websub',
+	'sub.firefox.documentation',
+	'sub.firefox.obsolete_63',
+	'sub.firefox.title',
+	'sub.import_export.export',
+	'sub.import_export.export_opml',
+	'sub.import_export.feed_list',
+	'sub.import_export.file_to_import',
+	'sub.import_export.file_to_import_no_zip',
+	'sub.import_export.import',
+	'sub.import_export.title',
+	'sub.menu.add_feed',
+	'sub.menu.bookmark',
+	'sub.menu.import_export',
+	'sub.menu.subscription_tools',
+	'sub.title.add_category',
+	'sub.title.add_feed',
+	'sub.title.feed_management',
+	'sub.title.subscription_tools',
+	'user.email.validation.change_email',
+	'user.email.validation.feedback.email_sent',
+	'user.email.validation.need_to',
+	'user.email.validation.resend_email',
+	'user.email.validation.title',
+	'user.mailer.email_need_validation.title',
+	'user.mailer.email_need_validation.welcome',
+	'user.password.invalid',
+	'user.tos.feedback.invalid',
+);
diff --git a/cli/i18n/ignore/es.php b/cli/i18n/ignore/es.php
index f6684fd81..63f2ac2c4 100644
--- a/cli/i18n/ignore/es.php
+++ b/cli/i18n/ignore/es.php
@@ -5,6 +5,7 @@ return array(
 	'gen.lang.cz',
 	'gen.lang.de',
 	'gen.lang.en',
+	'gen.lang.en-us',
 	'gen.lang.es',
 	'gen.lang.fr',
 	'gen.lang.he',
diff --git a/cli/i18n/ignore/fr.php b/cli/i18n/ignore/fr.php
index a2718b625..ec792d576 100644
--- a/cli/i18n/ignore/fr.php
+++ b/cli/i18n/ignore/fr.php
@@ -23,6 +23,7 @@ return array(
 	'gen.lang.cz',
 	'gen.lang.de',
 	'gen.lang.en',
+	'gen.lang.en-us',
 	'gen.lang.es',
 	'gen.lang.fr',
 	'gen.lang.he',
diff --git a/cli/i18n/ignore/he.php b/cli/i18n/ignore/he.php
new file mode 100644
index 000000000..7c0351294
--- /dev/null
+++ b/cli/i18n/ignore/he.php
@@ -0,0 +1,5 @@
+<?php
+
+return array(
+	'gen.lang.en-us',
+);
diff --git a/cli/i18n/ignore/it.php b/cli/i18n/ignore/it.php
index 1c987d8b3..4ce908b82 100644
--- a/cli/i18n/ignore/it.php
+++ b/cli/i18n/ignore/it.php
@@ -2,4 +2,5 @@
 
 return array(
 	'gen.dir',
+	'gen.lang.en-us',
 );
diff --git a/cli/i18n/ignore/kr.php b/cli/i18n/ignore/kr.php
index 184c94b98..fd563bd59 100644
--- a/cli/i18n/ignore/kr.php
+++ b/cli/i18n/ignore/kr.php
@@ -24,6 +24,7 @@ return array(
 	'gen.lang.cz',
 	'gen.lang.de',
 	'gen.lang.en',
+	'gen.lang.en-us',
 	'gen.lang.es',
 	'gen.lang.fr',
 	'gen.lang.he',
diff --git a/cli/i18n/ignore/nl.php b/cli/i18n/ignore/nl.php
index 5a14f1317..40aec065b 100644
--- a/cli/i18n/ignore/nl.php
+++ b/cli/i18n/ignore/nl.php
@@ -21,6 +21,7 @@ return array(
 	'gen.lang.cz',
 	'gen.lang.de',
 	'gen.lang.en',
+	'gen.lang.en-us',
 	'gen.lang.es',
 	'gen.lang.fr',
 	'gen.lang.he',
diff --git a/cli/i18n/ignore/oc.php b/cli/i18n/ignore/oc.php
index facb78702..71e89749b 100644
--- a/cli/i18n/ignore/oc.php
+++ b/cli/i18n/ignore/oc.php
@@ -23,6 +23,7 @@ return array(
 	'gen.lang.cz',
 	'gen.lang.de',
 	'gen.lang.en',
+	'gen.lang.en-us',
 	'gen.lang.es',
 	'gen.lang.fr',
 	'gen.lang.he',
diff --git a/cli/i18n/ignore/pt-br.php b/cli/i18n/ignore/pt-br.php
index 7721d23b6..228b1ad78 100644
--- a/cli/i18n/ignore/pt-br.php
+++ b/cli/i18n/ignore/pt-br.php
@@ -17,6 +17,7 @@ return array(
 	'gen.lang.cz',
 	'gen.lang.de',
 	'gen.lang.en',
+	'gen.lang.en-us',
 	'gen.lang.es',
 	'gen.lang.fr',
 	'gen.lang.he',
diff --git a/cli/i18n/ignore/ru.php b/cli/i18n/ignore/ru.php
index 1c987d8b3..4ce908b82 100644
--- a/cli/i18n/ignore/ru.php
+++ b/cli/i18n/ignore/ru.php
@@ -2,4 +2,5 @@
 
 return array(
 	'gen.dir',
+	'gen.lang.en-us',
 );
diff --git a/cli/i18n/ignore/sk.php b/cli/i18n/ignore/sk.php
index 66940c758..5769f3f01 100644
--- a/cli/i18n/ignore/sk.php
+++ b/cli/i18n/ignore/sk.php
@@ -32,6 +32,7 @@ return array(
 	'gen.lang.cz',
 	'gen.lang.de',
 	'gen.lang.en',
+	'gen.lang.en-us',
 	'gen.lang.es',
 	'gen.lang.fr',
 	'gen.lang.he',
diff --git a/cli/i18n/ignore/tr.php b/cli/i18n/ignore/tr.php
index 1c987d8b3..4ce908b82 100644
--- a/cli/i18n/ignore/tr.php
+++ b/cli/i18n/ignore/tr.php
@@ -2,4 +2,5 @@
 
 return array(
 	'gen.dir',
+	'gen.lang.en-us',
 );
diff --git a/cli/i18n/ignore/zh-cn.php b/cli/i18n/ignore/zh-cn.php
index e687a3de9..fa6071106 100644
--- a/cli/i18n/ignore/zh-cn.php
+++ b/cli/i18n/ignore/zh-cn.php
@@ -13,6 +13,7 @@ return array(
 	'gen.lang.cz',
 	'gen.lang.de',
 	'gen.lang.en',
+	'gen.lang.en-us',
 	'gen.lang.es',
 	'gen.lang.fr',
 	'gen.lang.he',
diff --git a/cli/manipulate.translation.php b/cli/manipulate.translation.php
index b5c37d147..5ccbaa664 100644
--- a/cli/manipulate.translation.php
+++ b/cli/manipulate.translation.php
@@ -66,6 +66,14 @@ switch ($options['a']) {
 			exit;
 		}
 		break;
+	case 'ignore_unmodified' :
+		if (array_key_exists('l', $options)) {
+			$i18nData->ignore_unmodified($options['l'], array_key_exists('r', $options));
+		} else {
+			error('You need to specify a valid set of options.');
+			exit;
+		}
+		break;
 	default :
 		help();
 		exit;
@@ -133,8 +141,15 @@ Exemple 6: ignore a key. It adds the key in the ignore file to mark it as transl
 Exemple 7: revert ignore a key. It removes the key from the ignore file.
 	php %1\$s -a ignore -r -k my_key -l my_lang
 
-Exemple 8: check if a key exist.
+Exemple 8: ignore all unmodified keys. It adds all modified keys in the ignore file to mark it as translated.
+	php %1\$s -a ignore_unmodified -l my_lang
+
+Exemple 9: revert ignore of all unmodified keys. It removes the unmodified keys from the ignore file.  Warning, this will also revert keys added individually.
+	php %1\$s -a ignore_unmodified -r -l my_lang
+
+Exemple 10: check if a key exist.
 	php %1\$s -a exist -k my_key\n\n
+
 HELP;
 	$file = str_replace(__DIR__ . '/', '', __FILE__);
 	echo sprintf($help, $file);