A regional/local language is a language spoken in an area of a sovereign state, whether or not it's a small region, a federated state or province, or some wider region.

Across the world, for the functions of the European charter for regional or Minority Languages, "regional or minority languages" way languages which can be:

Traditionally used within a given territory of a state with the aid of nationals of that state who shape a collection numerically smaller than the rest of the nation's populace; and special from the authentic language(s) of that nation

reputation of local or minority languages ought to not be careworn with popularity as an official language.