During a conclave, the participants (cardinals) come from all over the world. Is there a *lingua franca* which they are all expected to master at least at a conversational level? (I am guessing that this would be Italian, or English, or (probably not) Latin). Or are they expected to somehow manage between themselves, though overlapping language capacities? (A speaks Italian, B speaks Italian and French, C speaks French - so after some gymnastics A, B and C can be more or less synchronized). I do not believe they have translation services for confidentiality reasons.

Some Eastern Patriarchs in the Catholic Church are also Cardinals. Given that they are otherwise eligible, they can participate in the Conclave to elect the pope. However, they specifically *cannot* elect the [Dean of the College of Cardinals](https://en.wikipedia.org/wiki/Dean_of_the_College_of_Cardinals) . I was not aware that their voting rights were abridged in this manner. This led me to ask... What other positions in the College of Cardinals can the Eastern Patriarch Cardinals *not* vote for?