Columbia subject headings:
Harvard subject headings:
Language and culture--History--To 1500.
Languages in contact--History--To 1500.
Multilingualism and literature--History--To 1500.
Multilingualism--History--To 1500.
Princeton subject headings:
Historical linguistics.
Language and culture--Europe--History.
Languages in contact--Europe--History.
Multilingualism--Europe--History.