- * 'all' all available languages
- * 'mw' only if the language is defined in MediaWiki or wgExtraLanguageNames (default)
- * 'mwfile' only if the language is in 'mw' *and* has a message file
- * @return array Language code => language name
+ * 'all' all available languages
+ * 'mw' only if the language is defined in MediaWiki or wgExtraLanguageNames (default)
+ * 'mwfile' only if the language is in 'mw' *and* has a message file
+ * @return array Language code => language name (sorted by key)