Pretty sure i just broke google translate(couldn't translate your last post), but from what i could gather ...
Maybe they want english, looked in forum rules in getting started guide
http://www.project1999.com/forums/showthread.php?t=2651 and didn't see anything specific about language other than just being appropriate. They may have deemed it hostile or just slightly,but I doubt it, /shrug it's their playground. My money is on them just not being able to read it but only they could say.