For the most part, what it seems your supposed to do is find the Origonal German sound file from the german game, but i beleive there are seperate ones for the factions, then it would take some renaming, and then if you did it right, you would have English Brits and Americans and German Wehr and PE
EDIT: I just checked the soudn files to make sure i was right, i was, so if anyone has a German or knows where to find a file called
"AxisSpeechGerman.sga", Please link it. Also i would like a new version.