pro fratribus perversis

We're doing a few of the original Carmina Burana collection next week, and I'll be singing one of the 14 little solo lines in Carmen Potatorium (In Taberna Quando Sumus). Don't know which one, because conductor will allocate them. So now I'm practising a nasal tone and a German accent with added drunken-ness. Not an expert on any of those.