Sicilian is a Romance language with about 5 million speakers in Sicily and in parts of Calabria and Puglia in southern Italy. There are also many Sicilians and people of Sicilian origin in the USA, Canada, Australia, Argentina and Germany. In Sicily the majority of Sicilians are bilingual in Sicilian and Italian.
Sicilian is a descendant of Latin brought to Sicily by the Romans after they annexed the island in about 261 BC. Over the years Sicilian has absorbed vocabulary from many different languages, including Greek, Latin, Arabic, French, Lombard, Provençal, German, Catalan, Spanish, Italian, and also from the languages of the pre-Roman inhabitants of the island: the Sicani, Elymi, Siculi and Phoenicians.
source
wikipedia.org,
omniglot.com &
ethnologue.com