Add a language reference while adding a new one (#3044)

Before, all new languages were generated from the reference language which
was English. It makes sense for new languages but not so much for new language
flavor (ex: French Canadian versus French French)
Now, there is a way to select the reference language while adding a new one.

1 files changed, 6 insertions, 2 deletions

diff --git a/cli/i18n/I18nData.php b/cli/i18n/I18nData.php
index 2f09a5525..5071c9be9 100644
--- a/cli/i18n/I18nData.php
+++ b/cli/i18n/I18nData.php
@@ -123,13 +123,17 @@ class I18nData {
 	 * Add a new language. It's a copy of the reference language.
 	 *
 	 * @param string $language
+	 * @param string $reference
 	 * @throws Exception
 	 */
-	public function addLanguage($language) {
+	public function addLanguage($language, $reference = null) {
 		if (array_key_exists($language, $this->data)) {
 			throw new Exception('The selected language already exist.');
 		}
-		$this->data[$language] = $this->data[static::REFERENCE_LANGUAGE];
+		if (!is_string($reference) && !array_key_exists($reference, $this->data)) {
+			$reference = static::REFERENCE_LANGUAGE;
+		}
+		$this->data[$language] = $this->data[$reference];
 	}
 
 	/**