Can't get language to change

I heard you can change language if you own a physical copy of the game, since the game originally had multiple languages available.
Unlike most games in the world, you couldn't change language by accessing an in-game menu and selecting which language you prefer to have, you had to change configuration in Windows: http://forums.ltheory.com/viewtopic.php?t=4475&p=99015
I imagine they must've received lots of complaints from their fans for how inconvenient it was to have language changed like that, and perhaps that's the reason they decided to only include english in the Steam and gOg releases.
If you do a search for different languages, you'll find some websites where you can download patches/packs etc. I won't post links because I don't know which of these files/sites are harmless, ou harmful to computer.
I found german Language Pack (2.3.0.0) and a french patch doing a quick search in internet. Keep in mind it may or may not be compatible with gOg or Steam release, so you better do a backup first.
The site where I found german language pack said it is compatible with gOg release, so if that's the language you want (for whatever reason) you probably won't have problems.

odd, I got mine from Gog and its not in english, and I cant find a choice for another language that will work.