Hi, I have the Czech version, I installed it with the Czech key and of course the game is in Czech! Now, I installed it again only this time withe a German key, and viola!! Now its in German. Now, if we could somehow figure out a keygen, all we need is to input a US key and bingo, no need to fart around with language mods.
Also the CZ 1.01 patch works fine with a German key.