I haven't done anything to the non-English languages in the files. But I have copied and pasted a lot, since there is more text in the mod than in the normal game. So if you were to try this mod with another language, you'd probably get some really bizarre results I'm afraid.
Now, if anyone wanted to make translations...
I guess I'll just try it out, and then report what happens.
Edit: Looks like I get no changed quotes at all, only the standard ones. If you like I could try to translate the new quotes into German.