French and Italian are the official languages in Corsica while Corsu is the traditional native language. Today almost all Corsicans are fluent in French, while about 50% can communicate in Corsu.

The Corsican language, Corsu, is a Neo-Latin language in the group of Romance languages and is connected to Tuscan dialect.

There are many dialects of Corsu including:

The Cismontano: found in the northeast (Bastia, Corte). Heavy influenced by Tuscany, this dialect is the more widespread and standardized language on the island. This dialect is very similar to Italian and perhaps takes after the Florentine dialect.

The Oltremontano: found in the southwest (Ajaccio, Sartene). More archaic and conservative, this southern dialect is strongly related to the Sardinian dialect of Northern Sardinia, brought to Corsica by sailors and immigrants over the centuries and later independently evolved into the dialect which is spoken today.

In Bonifacio and Calvi they speak a Ligurian-like dialect, which is sometimes taught in primary schools