<span>social contagion
This happens when there is the inclination for certain conduct displayed by one individual to be duplicated by other people who are either in the region of the first person who displayed that behaviour . It was initially postulated by Gustave Le Bon in 1895</span>
I believe the answer is: the Columbian Exchange
Columbian exchange refers to the exchange of knowledge, labour culture, plants , and animals that heppened between countries in american continent during the 1500s. When the exchange happens, different races crossbreed with one another which resulted in the birth of new races.
It is probably because Moroccan, Algerian, Tunisian, and Libyan, people back in the day migrated to Italy for better opportunities. And so they most likely spread the language and culture throughout Italy.
