A received pedagogical variant derived from it historically, once called la pronuncia fiorentina emendata (literally, 'the amended Florentine pronunciation'), was officially prescribed as the national language of the Kingdom of Italy, when it was established in 1861.

[2] Florentine, and Tuscan more generally, can be distinguished from Standard Italian by differences in numerous features at all levels: phonology, morphology, syntax and lexicon.

Perhaps the difference most noticed by Italians and foreigners alike is known as the gorgia toscana (literally 'Tuscan throat'), a consonant-weakening rule widespread in Tuscany in which the voiceless plosive phonemes /k/, /t/, /p/ are pronounced between vowels as fricatives [h], [θ], [ɸ] respectively.

Strengthening to a geminate consonant occurs when the preceding word triggers syntactic doubling (raddoppiamento fonosintattico) so the initial consonant /p/ of pipa 'pipe (for smoking)' has three phonetic forms: [p] in [ˈpiːɸa] spoken as a single word or following a consonant, [ɸ] if preceded by a vowel as in [la ɸiːɸa] la pipa 'the pipe' and [pp] (also transcribed [pː]) in [tre pˈpiːɸe] tre pipe 'three pipes'.

The word gelato is pronounced with [dʒ] following a pause or a consonant, [ʒ] following a vowel and [ddʒ] if raddoppiamento applies ([dʒeˈlaːθo], [un dʒeˈlaːθo] un gelato, [ˈkwattro ʒeˈlaːθi] quattro gelati, [ˈtre ddʒeˈlaːθi] tre gelati.