Columbia subject headings:
Europe--Languages.
Minorities--Europe.
Harvard subject headings:
Europe--Languages--Law and legislation.
European Charter for Regional or Minority Languages
Minorities--Legal status, laws, etc.--Europe
Princeton subject headings:
Europe--Ethnic relations.
Europe--Languages--Law and legislation.
Europe--Languages--Political aspects.
Language policy--Europe.
Linguistic minorities--Legal status, laws, etc.--Europe.