Columbia subject headings:
Harvard subject headings:
Comparative linguistics.
Corpora (Linguistics)--Cross-cultural studies.
Endangered languages--Cross-cultural studies.
Languages in contact--Cross-cultural studies.
Linguistic change--Cross-cultural studies.
Multilingualism--Cross-cultural studies.
Princeton subject headings:
Comparative linguistics.
Endangered languages--Cross-cultural studies.
Languages in contact--Cross-cultural studies.
Linguistic change--Cross-cultural studies.