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 "Sardinian language"): However, it also incorporates a Pre-Latin (Paleo-Sardinian, also known as Nuragic, and, to a much lesser degree, Punic) substratum, and a Byzantine Greek, Catalan, Spanish and Italian superstratum due to the past political membership of the island, first falling into the Hispanic sphere of influence and later towards the Italian one.
Relevant evidence: No