Origins

During the Middle Ages, the established written language in Europe was Latin, though the great majority of people were illiterate, and only a handful were well versed in the language. In the Italian peninsula, as in most of Europe, most would instead speak a local vernacular. These dialects, as they are commonly referred to, evolved from Vulgar Latin over the course of centuries, unaffected by formal standards and teachings. They are not in any sense “dialects” of standard Italian, which itself started off as one of these local tongues, but sister languages of Italian. Mutual intelligibility with Italian varies widely, as it does with Romance languages in general. The Romance dialects of Italy can differ greatly from Italian at all levels (phonology, morphology, syntax, lexicon, pragmatics) and are classified typologically as distinct languages.^[15][16]

The standard Italian language has a poetic and literary origin in the writings of Tuscan writers of the 12th century, and, even though the grammar and core lexicon are basically unchanged from those used in Florence in the 13th century,^[17] the modern standard of the language was largely shaped by relatively recent events. However, Romance vernacular as language spoken in the Apennine peninsula has a longer history. In fact, the earliest surviving texts that can definitely be called vernacular (as distinct from its predecessor Vulgar Latin) are legal formulae known as the Placiti Cassinesi from the Province of Benevento that date from 960 to 963, although the Veronese Riddle, probably from the 8th or early 9th century, contains a late form of Vulgar Latin that can be seen as a very early sample of a vernacular dialect of Italy.^[18]

The language that came to be thought of as Italian developed in central Tuscany and was first formalized in the early 14th century through the works of Tuscan writer Dante Alighieri, written in his native Florentine. Dante’s epic poems, known collectively as the Commedia, to which another Tuscan poet Giovanni Boccaccio later affixed the title Divina, were read throughout the peninsula and his written dialect became the “canonical standard” that all educated Italians could understand. Dante is still credited with standardizing the Italian language. In addition to the widespread exposure gained through literature, the Florentine dialect also gained prestige due to the political and cultural significance of Florence at the time and the fact that it was linguistically an intermediate between the northern and the southern Italian dialects.^[15]:22 Thus the dialect of Florence became the basis for what would become the official language of Italy.

Italian was progressively made an official language of most of the Italian states predating unification, slowly replacing Latin, even when ruled by foreign powers (like Spain in the Kingdom of Naples, or Austria in the Kingdom of Lombardy-Venetia), even though the masses kept speaking primarily their local vernaculars. Italian was also one of the many recognised languages in the Austro-Hungarian Empire.

Italy has always had a distinctive dialect for each city because the cities, until recently, were thought of as city-states. Those dialects now have considerable variety. As Tuscan-derived Italian came to be used throughout Italy, features of local speech were naturally adopted, producing various versions of regional Italian. The most characteristic differences, for instance, between Roman Italian and Milanese Italian are the gemination of initial consonants and the pronunciation of stressed “e”, and of “s” in some cases: e.g. va bene “all right” is pronounced [vabˈbɛːne] by a Roman (and by any standard Italian speaker), [vaˈbeːne] by a Milanese (and by any speaker whose native dialect lies to the north of the La Spezia–Rimini Line); a casa “at home” is [akˈkaːsa] for Roman, [akˈkaːsa] or [akˈkaːza] for standard, [aˈkaːza] for Milanese and generally northern.^[19]

In contrast to the Gallo-Italic linguistic panorama of northern Italy, the Italo-Dalmatian Neapolitan and its related dialects were largely unaffected by the Franco-Occitan influences introduced to Italy mainly by bards from France during the Middle Ages, but after the Norman conquest of southern Italy, Sicily became the first Italian land to adopt Occitan lyric moods (and words) in poetry. Even in the case of Northern Italian languages, however, scholars are careful not to overstate the effects of outsiders on the natural indigenous developments of the languages.

The economic might and relatively advanced development of Tuscany at the time (Late Middle Ages) gave its language weight, though Venetian remained widespread in medieval Italian commercial life, and Ligurian (or Genoese) remained in use in maritime trade alongside the Mediterranean. The increasing political and cultural relevance of Florence during the periods of the rise of the Banco Medici, Humanism, and the Renaissance made its dialect, or rather a refined version of it, a standard in the arts.