Yeah, I agree, That’s why I mentioned it first. However, the other languages (especially Venetian) were still highly influential at the time, so they could still work.
There was a mixture of Romance, Greek and Arabic speakers (among the lower class, upper classes spoke the language of the ruling people at the time: Norman French, Classic Arab, Koine Greek, etc.), it used to be a highly culturally diverse island. I don’t know how different the language of those Romance speakers may have been compared to the modern Sicilian used for the civ, but probably a lot.
You seem to have gotten it wrong. Latin isn’t Italian, Italian is devired from Latin.
But there’s quite a lot of civs speaking the wrong language (or poorly acted lines) even if you ignore the civs that just speak their modern language.
Byzantines, Berbers, Goths, Aztecs (in-game Aztecs don’t even speak a real language) and Persian, from what I can remember right now.
Not counting Huns since, y’know.
The Italians, at least in the Papal States, spoke Latin for several centuries and in Byzantium, until the 7th century, but yeah, they could port the Greek audios from AoM and Italian from AoE 3 to AoE 2…
That’s when Tuscan was standardized, Romance languages are far older though. They’re usually considered to have diverged during the early Middle Ages and already became distinct languages by the 8th/9th Century.
Other than a couple of leader name, the civ is primarily based on late Medieval states of North Italy (see their unique units and techs).
Even though that’s better than having them speak Latin, it would make more sense to use Medieval Tuscan, from Alighieri’s times.