The Italian language is a Romance language spoken by about 63 million people, primarily in Italy. In Switzerland, Italian is one of four official languages. It is also the official language of San Marino. Standard Italian, adopted by the state after the unification of Italy, is based on Tuscan dialect and is somewhat intermediate between Italo-Dalmatian languages of the South and Northern Italian dialects of the North.

Unlike most other Romance languages, Italian has retained the contrast between short and long consonants which existed in Latin. As in most Romance languages, stress is distinctive. Of the Romance languages, Italian is considered to be one of the closest resembling Latin in terms of vocabulary.

Italian was first formalized in the first years of the 14th century through the works of Dante Alighieri, who mixed southern Italian languages, especially Sicilian, with his native Tuscan in his epic poems known collectively as the Commedia, to which Giovanni Boccaccio later affixed the title Divina. Dante's much-loved works were read throughout Italy and his written dialect became the "canonical standard" that others could all understand. Dante is still credited with standardizing the Italian language and, thus, the dialect of Tuscany became the basis for what would become the official language of Italy.