A regional language is a language spoken in an area that is part of a larger nation state.
Internationally, the European Charter for Regional or Minority Languages, "regional or minority languages" means languages that are:[1]
A regional language is, in terms of political status, different from the official language of the country where it is spoken. The regional languages are sometimes recognized and protected by the regional government or the state: many states across the world recognize regional languages, and give them a status, as is the case, for example, of Wallonia, Spain, Italy or Switzerland. In other cases the state does not grant official status as an official language of the country; it is the case with the regional languages of France, which can be studied but cannot be used in the government or any public service, where only French is official.