How to Include the Language File into ACS
When the translation is finished, the language file must be copied to the lang subfolder within the ACS folder (if the file isn't there already). The file must be named as the supported languages of the ACS. At the moment, en-GB, de-AT, es-ES and pl-PL are supported. Furthermore, the file must have the ending .txt. For the German language file, it would look like de-AT.txt.