Question: Casu modde, casu cundídu and casu fràzigu , translated to English means "rotten/putrid cheese", is what  primary indigenous Romance language spoken on most of the island of Sardinia ?
Sentence (from "Corsican language"): Over the next two centuries, the use of French grew to the extent that, by the Liberation in 1945, all islanders had a working knowledge of French.
Relevant evidence: No