Columbia subject headings:
Harvard subject headings:
Code switching (Linguistics)--Congresses.
English language--History--Congresses.
Historical linguistics--Congresses.
Languages in contact--History--Congresses.
Multilingualism and literature--History--Congresses.
Multilingualism--History--Congresses.
Princeton subject headings:
Code switching (Linguistics)
English language--History.
Historical linguistics.
Languages in contact--History.
Multilingualism and literature--History.
Multilingualism--History.