Bilingual method ; Mother tongue (teaching of) ; Instruction (medium of) ; Medium of instruction ; Sprachenpolitik; Language management; Language politics ; Alternation (biling.) ; Language shift (biling.) ; Sprachwechsel (biling.) ; Bilingual education ; Africa (English language in) ; Afrika (engl. Sprache in) ; English in Africa ; Ife̥; Ekiti; Ijesha; Lucumí