Columbia subject headings:
Harvard subject headings:
Language and culture.
Language and languages
Language obsolescence.
Native language
Sociolinguistics.
Princeton subject headings:
Freud, Sigmund, 1856-1939--Language.
Jews--Languages.
Kafka, Franz, 1883-1924--Language.
Language and culture.
Language and languages.
Language obsolescence.
Native language.
Perec, Georges, 1936-1982--Language.
Sociolinguistics.
Yiddish language--History.