Gallo-Romance languages
The Gallo-Romance branch of the Romance languages includes French and the languages of northern Italy. Based on mutual intelligibility, David Dalby counts seven languages: Gallo-Wallon, French, Franco-Provençal (Arpitan), Romansh, Ladin, Friulian, and Lombard. However, other definitions are far broader, variously encompassing the Rhaeto-Romance languages, Occitano-Romance languages, and Gallo-Italic languages.
Classification
The Gallo-Romance group includes:
The Langues d'oïl, or Oïl languages. These include Standard French, Picard, Walloon, Lorrain and Normand, Poitevin, Bourgignon. These are the most phonologically innovative Romance varieties.
The Arpitan language, also known as Franco-Provençal, of southeastern France, western Switzerland, and Aosta Valley region of northwestern Italy. Formerly thought of as a dialect of either Oïl or Occitan, it is linguistically a language on its own, or rather a separate group of languages, as many of its dialects have little mutual comprehensibility. It shares features of both French and the Provençal dialect of Occitan.