Steps to reproduce the issue

Right now the Joomla! app uses a rather strange method to sort and display the available languages in the language drop-down menu on the Joomla! admin login page.

In the JLanguage class an SPL iterator (RecursiveIteratorIterator) is being used to get a list of all languages files. From this list it picks the xml files and parses them in order to get the language's metadata. However, that iterator outputs the list of files in their physical order they are stored on the drive. So on different envs depending on how the languages were installed the order could be literally random.

To reproduce the issue install languages and then modify the creation/modification dates of the XML files of the languages. The languages will be "sorted" in the drop down menu based on this information.

Expected result

The list of languages should be sorted based on the locale code and not based on the creation/modification date of the XML files.

Actual result

Right now the list is sorted based on the creation/modification date of the XML files.

System information (as much as possible)

CentOS 6
Apache 2.4
PHP 5.5.17

More info will be provided if it is needed.

Additional comments

One way to solve the issue is to sort the two-dimensional array based on the locale code before actually returning the results and displaying them on the site. The function we're talking about here is createLanguageList:

public static function createLanguageList($actualLanguage, $basePath = JPATH_BASE, $caching = false, $installed = false)