Cameroon ; Sprachenzählung; Demography (linguistics) ; Language census ; Anthropology (linguistics) ; Anthropologie (linguistische) ; Ethnolinguistics ; Elderspeak; Gerontolekt; Seniorensprache; Old age (language behavior) ; Sex-specific communication; Genderlect; Sex-specific language behavior; Gender-specific language behavior; Geschlechtsspezifisches Sprachverhalten; Gender-specific communication ; Sprachenwahl; Language choice; Diglossia ; Verkehrssprache ; Afrika (fr. Sprache in) ; Africa (French language in) ; French in Africa ; Chadic languages ; Fulfulde; Peul; Pulaar ; Narrow Bantu; Bantu languages