How do I change the language of the German version of Fallout 3 to English?
The only way I know of to change languages in fallout 3 would be a language MOD. It is worth mentioning that I was able to pick up fallout 3 GOTY edition here in Australia for a dollar. It saved to my games for windows live account, not steam, but I can re-download the game from the GFWL client despite originally purchasing a disc copy.
If you are able to get a deal like mine, it might be worth simply buying a English CD key and enjoying the native English version with all its violent splendour.