Italo-Western is, in some classifications, the largest branch of the Romance languages. It in turn comprises two branches, Italo-Dalmatian and Western:
- Italo-Dalmatian includes central and southern Italian languages, such as Neapolitan and Sicilian, Judeo-Italian, Corsican and the extinct Dalmatian. Based on mutual intelligibility, Dalby lists four languages: Corsican, Italian (Tuscan–Central), Napolitan-Sicilian, and Dalmatian.
- The Western branch includes major languages such as French, Spanish, and Portuguese. Dalby lists a dozen languages: Portuguese, Spanish, Asturian-Leonese, Aragonese, Catalan, Gascon, Provençal, Gallo-Wallon, French, Franco-Provençal, Romansh, and Ladin.
- ^ Nordhoff, Sebastian; Hammarström, Harald; Forkel, Robert; Haspelmath, Martin, eds. (2013). "Italo-Western Romance". Glottolog 2.2. Leipzig: Max Planck Institute for Evolutionary Anthropology.
- ^ a b David Dalby, 1999/2000, The Linguasphere register of the world’s languages and speech communities. Observatoire Linguistique, Linguasphere Press. Volume 2. Oxford.