Not bad, but sicilian should appear no matter what, and also if they are ruled by muslims. Also I would like to see a sardinian culture for sardinia and corsica (even though corsica was never sardinian) and neapolitan if greek provinces in the south of italy are ruled by italians, or pugliese. Anyway, many of the cultures in south italy were influenced by muslims so maybe south italian cultures could spawn if they invade italy. Oh yeah and ligurian too (if possible).
Oh. I forget about Sardinian on my list. I already added them with a name list
And yes... South Italy is a real melting pot. Not easy to say what should happen there. Maybe I will add a Sicilian Arabic culture and Neapolitan culture for Norman influence... Hm...