Mother tongue (teaching of) ; Ethnizität und Sprache; Ethnicity and language; Language and ethnicity ; Sprachenpolitik; Language management; Language politics ; Multilingualism; Polylingualism; Plurilingualism ; Sprachbewahrung; Ethnolinguistic vitality; Vitality, ethnolinguistic; Sprachwechsel; Language shift; Heritage language; Language maintenance ; Africa (English language in) ; Afrika (engl. Sprache in) ; English in Africa ; Kxoé; Xũ-Khwe; Khoe; San ; Tswana
