Columbia subject headings:
Harvard subject headings:
English language--Germany.
Esperanto--Germany.
Exiles--Germany--Language.
German language--Acquisition.
Immigrants--Germany--Language.
Intercultural communication--Germany
Languages in contact--Germany.
Lingua francas--Germany.
Multilingualism--Germany.
Princeton subject headings:
English language--Germany.
Esperanto--Germany.
German language--Acquisition.
Immigrants--Germany--Language.
Intercultural communication--Germany.
Multilingualism--Germany.