So, what language did they speak, i'm pretty sure it wasn't english lol, because some may say that they spoke english because you hear them speak it but i think that was the Animus translating, and even if it was, when Minerva spoke to Ezio was she speaking italian? Witch leads us to another question, did they use the peices of eden to speak italian (to Ezio) or english to Desmond?
The point is what was there main language?