I am really disappointed myself because of that. Its been weeks since the game was released and nothing so far. Most of the players with this particular problem had to sell the game. And that is not fair. When i buy a game i want to have the full experience and in this case i have to turn the sound all the way down so 47 wouldn't sound like Hitler Its a shame.
Hope a language pack will be uploaded on XBox live soon ( it should have been uploaded before the game was released if you ask me ) cos i am starting to think of selling the game myself.