European Charter for Regional or Minority Languages references on wikipedia
European_Charter_for_Regional_or_Minority_Languages The European Charter for Regional or Minority Languages (ECRML) is a European treaty (CETS 148) adopted in 1992 under the auspices of the Council of Europe to protect and promote historical regional and minority languages in Europe. It only applies to languages traditionally used by the nationals of the State Parties (thus excluding languages used by recent immigrants from other states), which significantly differ from the majority or official language (thus excluding what the state party wishes to consider as mere local dialects of the official or majority language) and which either have a territorial basis (and are therefore traditionally spoken by populations of regions or areas within the State) or are used by linguistic minorities within the State as a whole (thereby including such languages as Yiddish and Romani, which are used over a wide geographic area).