Don't think i've heard that one before.. The problem is.. I may be wrong but I think the Germans and Americans use the same text line for there taunts and everything. So even though you hear a German voice.. I think the actual text is taken from the same place as the American text.. So changing it would make everything German. Even American taunts.
If you have alot of time on your hands, take each line from the localization file and change the 2nd instance to German. That would work, but would take awhile.