I really want this to involve an attempt at conversing in Latin that goes badly, badly wrong and everybody except Marcone and Harry are staring at them. (Possibly based on, I dunno, the verb nubere which can mean both to "to veil" and "to get married"? Or maybe they're talking about Harry's determination not to work for anybody else but they use "sponsa" (fiance) instead of "sponsor" (slave/servant)?)

But my Latin is worse than Harry's, so I cannot be the one to do this...