MediaLibrary Modules Support

Hi supporter!

I would like to add a new language to a MediaLibrary v 1.5.3.4 Pro.
Present languages:
-English
-Dutch
-Italian
-French
-German
-Spanish
-Russian

I would like to write new one to this: Hungarian language

But i don't see it where it is necessary to register it. Where I have to write it, that the "Settings Backend" -- "Default language:" in an a drop-down list
let him be eligible the "Hungarian" lingual file and let the system interpret it.
How shall I define this? : _MEDIALIBRARY_LANGUAGE_HUN
We wan't to juse a hungarian language in a MediaLibrary v 1.5.3.4 Pro, please help for as.
Best regards!

Thank you!