Rename the Genoese Crossbowmen to the Pavisier, so the unit would not be that specific.
The water bonuses represent the Maritime republics, so to emphasize a little bit more Venece, they can replace the Cannon Galleon with Galleass, I guess it can fire hand cannon projectiles against targets that are not buildings or siegeweapons.
Still mad Byz, Italians and Aztecs didn’t get new voice lines
(A lot of other civs would also benefit from new voice lines, including Ports and Persians)
Swapping languages is an easy switch to flip. Not gonna disagree with those two either mind you. But AGEeditor lets you change languages on the fly to another
As far as history is concerned, medieval Italy is a total and complete mess that could be turned into a saga like Game of Thrones. More suited to political than military games.