Roman origins lie first with the Estrucans during the formation. In my region(Basilicata) there is ample evidence to show that some of the structures are close to 7000 years old. The south has more of a greek influence above all else. Sicily is so unique, that there is no relationship to what happened on the mainland. Some events were missed that were positive, while others were negative. For instance, if it was not for Sicily, the Romans would not be fed. Wheat was the crown staple. But the Romans didnt leave a mark. To the surprise of others, some of the most advances were due to the Arab influence. There was a peace on the island.(The history of Sicilia is so expansive, I cant begin to elaborate)
As for the languages, everyone in Italy speaks the standard italian, naturally with their accents. Dialect is a political word only, as some of the languages spoke in Italy are not close to latin roots. For instance, Napulitiano is not recognized as an official language. Sardo is the closest to latin today by far. It is a mysterious language and is awesome to hear the quality and timber of the voice.
As for the Italians in Quebec, I am shocked to hear that they would just stay put in their rooms. Italians are not people to sit around and do nothing, even the southerners as well. We are an outside people, enjoying the warmth of our country. From what I know of Quebec it is a wonderful place for culture.
As for the Italians battle the French, I dont have a date off hand, but is was a very small battle, and one that the French thought could be easliy one. Not so as the Italians drew them to a standstill.
As far as the French go, Italians have some grudges against them. One of the amazing things was that it was an Italian lady(Catarina di Medici) that taught the French how to eat with a fork and to cook. But despite some grudges, we stand for our cultures full force.