Columbia subject headings:
Harvard subject headings:
Bilingualism
German language--Errors of usage.
German language--Grammar, Generative.
German language--Spoken German.
Spanish language--Errors of usage.
Spanish language--Grammar, Generative.
Spanish language--Spoken Spanish.
Princeton subject headings:
German language--Errors of usage.
German language--Spoken German.
Spanish language--Errors of usage.
Spanish language--Spoken Spanish.