Hello,
I started to translate your software to Hungarian language.
I've created hungarian.lng file, and modified isocode to hu.
The log on screen appears properly, but when I click log in button, I got the following message:
Error Protocol error #6
Coding of the lng file is utf-8 like the others. I have no idea what the problem is.
Thanks for your help,
Aron

As long as there is no official translation, you must keep en as isocode. Sorry for that.