Change regional language codes (#8065)

* Change regional language codes

According to `ISO-639-1` and `ISO-3166-1 alpha-2` recommendations, regional
languages must be written with the language code in lowercase and the region
in uppercase. For instance, we should have `en-US` instead of `en-us`.

Folders have been updated to reflect those recommendations and regional
language codes have been updated in the translation files.

* Update README files

* Fix configuration for typos

* Revert language order in documentation

* Remove unnecessary code

* Change language configuration getter

* Fix phpstan error

* Fix typo

* Add types

* escape regex

* Move language logic to avoid magic or deprecated methods

* Minor fix on regex

1 files changed, 110 insertions, 0 deletions

diff --git a/app/i18n/en-US/index.php b/app/i18n/en-US/index.php
new file mode 100644
index 000000000..7a019bce0
--- /dev/null
+++ b/app/i18n/en-US/index.php
@@ -0,0 +1,110 @@
+<?php
+
+/******************************************************************************
+ * Each entry of that file can be associated with a comment to indicate its   *
+ * state. When there is no comment, it means the entry is fully translated.   *
+ * The recognized comments are (comment matching is case-insensitive):        *
+ *   + TODO: the entry has never been translated.                             *
+ *   + DIRTY: the entry has been translated but needs to be updated.          *
+ *   + IGNORE: the entry does not need to be translated.                      *
+ * When a comment is not recognized, it is discarded.                         *
+ ******************************************************************************/
+
+return array(
+	'about' => array(
+		'_' => 'About',	// IGNORE
+		'agpl3' => '<a href="https://www.gnu.org/licenses/agpl-3.0.html">AGPL 3</a>',	// IGNORE
+		'bug_reports' => array(
+			'environment_information' => array(
+				'_' => 'System information',	// IGNORE
+				'browser' => 'Browser',	// IGNORE
+				'database' => 'Database',	// IGNORE
+				'server_software' => 'Server software',	// IGNORE
+				'version_curl' => 'cURL version',	// IGNORE
+				'version_frss' => 'FreshRSS version',	// IGNORE
+				'version_php' => 'PHP version',	// IGNORE
+			),
+		),
+		'bugs_reports' => 'Bug reports',	// IGNORE
+		'documentation' => 'Documentation',	// IGNORE
+		'freshrss_description' => 'FreshRSS is a self-hostable RSS aggregator and reader. It allows you to read and follow several news websites at a glance without the need to browse from one website to another. FreshRSS is lightweight, configurable, and easy to use.',	// IGNORE
+		'github' => '<a href="https://github.com/FreshRSS/FreshRSS/issues">on GitHub</a>',	// IGNORE
+		'license' => 'License',	// IGNORE
+		'project_website' => 'Project website',	// IGNORE
+		'title' => 'About',	// IGNORE
+		'version' => 'Version',	// IGNORE
+	),
+	'feed' => array(
+		'empty' => 'There are no articles to show.',	// IGNORE
+		'received' => array(
+			'before_yesterday' => 'Received before yesterday',	// IGNORE
+			'today' => 'Received today',	// IGNORE
+			'yesterday' => 'Received yesterday',	// IGNORE
+		),
+		'rss_of' => 'RSS feed of %s',	// IGNORE
+		'title' => 'Main stream',	// IGNORE
+		'title_fav' => 'Favorites',
+		'title_global' => 'Global view',	// IGNORE
+	),
+	'log' => array(
+		'_' => 'Logs',	// IGNORE
+		'clear' => 'Clear the logs',	// IGNORE
+		'empty' => 'Log file is empty',	// IGNORE
+		'title' => 'Logs',	// IGNORE
+	),
+	'menu' => array(
+		'about' => 'About FreshRSS',	// IGNORE
+		'before_one_day' => 'Older than one day',	// IGNORE
+		'before_one_week' => 'Older than one week',	// IGNORE
+		'bookmark_query' => 'Bookmark current query',	// IGNORE
+		'favorites' => 'Favorites (%s)',
+		'global_view' => 'Global view',	// IGNORE
+		'important' => 'Important feeds',	// IGNORE
+		'main_stream' => 'Main stream',	// IGNORE
+		'mark_all_read' => 'Mark all as read',	// IGNORE
+		'mark_cat_read' => 'Mark category as read',	// IGNORE
+		'mark_feed_read' => 'Mark feed as read',	// IGNORE
+		'mark_selection_unread' => 'Mark selection as unread',	// IGNORE
+		'mylabels' => 'My labels',	// IGNORE
+		'newer_first' => 'Newer first',	// IGNORE
+		'non-starred' => 'Show non-favorites',
+		'normal_view' => 'Normal view',	// IGNORE
+		'older_first' => 'Oldest first',	// IGNORE
+		'queries' => 'User queries',	// IGNORE
+		'read' => 'Show read',	// IGNORE
+		'reader_view' => 'Reading view',	// IGNORE
+		'rss_view' => 'RSS feed',	// IGNORE
+		'search_short' => 'Search',	// IGNORE
+		'sort' => array(
+			'_' => 'Sorting criteria',	// IGNORE
+			'c' => array(
+				'name_asc' => 'Category, feed titles A→Z',	// IGNORE
+				'name_desc' => 'Category, feed titles Z→A',	// IGNORE
+			),
+			'date_asc' => 'Publication date 1→9',	// IGNORE
+			'date_desc' => 'Publication date 9→1',	// IGNORE
+			'f' => array(
+				'name_asc' => 'Feed title A→Z',	// IGNORE
+				'name_desc' => 'Feed title Z→A',	// IGNORE
+			),
+			'id_asc' => 'Freshly received last',	// IGNORE
+			'id_desc' => 'Freshly received first',	// IGNORE
+			'link_asc' => 'Link A→Z',	// IGNORE
+			'link_desc' => 'Link Z→A',	// IGNORE
+			'rand' => 'Random order',	// IGNORE
+			'title_asc' => 'Title A→Z',	// IGNORE
+			'title_desc' => 'Title Z→A',	// IGNORE
+		),
+		'starred' => 'Show favorites',
+		'stats' => 'Statistics',	// IGNORE
+		'subscription' => 'Subscription management',	// IGNORE
+		'unread' => 'Show unread',	// IGNORE
+	),
+	'share' => 'Share',	// IGNORE
+	'tag' => array(
+		'related' => 'Article tags',	// IGNORE
+	),
+	'tos' => array(
+		'title' => 'Terms of Service',	// IGNORE
+	),
+);