I can confirm the Italian one. "Per me e` tutto arabo", which also makes sense in the context of their thesis that the "incomprehensible" language is one with which the speakers have some contact. The former Republic of Venice had a lot of contact with the "levant", and whereas Greek didn't seem to be problematic (the Venetian dialect incorporates, supposedly, a number of Greek loan words such as 'piron' for fork), I guess Arab was, and thus became the incomprehensible language.
