Corsican is a Romance language spoken by about 230,000 people. Most of the speakers live in Corsica, though there some in Paris and Marseilles and also in Bolivia, Canada, Cuba, Italy, Puerto Rico, Uruguay, the USA and Venezuela. Corsican has no official status in Corsica and French is the official language there.
Corsican is closely related to Italian, particularly to the dialect of Tuscany, and there is considerable mutal intelligibility between these languages. Corsican is essentially an oral language and as a result, there is considerable regional variation, particularly between the north and south of Corsica.
source
wikipedia.org,
omniglot.com &
ethnologue.com