Which language files are loaded?

Thx to the comments I found the plugin: Debug MO Translations

It returns a list of all searched and loaded MO files. The source code is provided on github: https://github.com/closemarketing/debug-mo-translations

Hata!: SQLSTATE[HY000] [1045] Access denied for user 'divattrend_liink'@'localhost' (using password: YES)