Because there is no such thing as "African Language".
Africa is a continent that contains 54 countries and more than 2100 completely different languages. Some estimates place the number of languages at around 3000.
The most prominent languages spoken in Africa are:
Afrikaans
Amharic
Arabic
English
French
Fula
Hausa
Igbo
Oroma
Somali
Swahili
Yoruba
Zulu
Kate Dorney has written: 'The changing language of modern English drama, 1945-2005' -- subject(s): Style, Theater, Linguistics in literature, English drama, History and criticism, English language, History
Rajesh Gopie has written: 'Out of bounds' -- subject(s): Drama, South African drama (English), East Indians
Michael Etherton has written: 'The development of African drama' -- subject(s): African drama (English), History, History and criticism, Theater 'Proceedings of the Tra Vinh Vietnam Aid Management and Coordination Seminar'
Governor General's Award for English-language drama was created in 1981.
Otto Reinert has written: 'Classic through modern drama' -- subject(s): Collections, Drama 'Working with prose' -- subject(s): American literature, English language, Rhetoric 'Drama' -- subject(s): Collections, Drama
Richard A. Via has written: 'English in three acts' -- subject(s): Drama in education, English language, Foreign speakers, Study and teaching
Samuel Lieberman has written: 'Roman drama' -- subject(s): Drama, Latin drama, Scripts, English drama, Translations into English, Translations
Suzanne Blow has written: 'Rhetoric in the plays of Thomas Dekker' -- subject(s): Drama, English language, Rhetoric, Technique
Thomas Dogget has written: 'The country-wake' -- subject(s): English drama, English drama (Comedy)
Walter Parker Bowman has written: 'Theatre language, a dictionary of terms in English of the drama and stage from medieval to modern times'
Moussa Jaffar Alsoudani has written: 'Modern English poetic drama as an antinaturalistic movement' -- subject(s): English Verse drama, English drama, History and criticism
Dawn Duncan has written: 'Language and identity in post-1800 Irish drama' -- subject(s): English drama, History and criticism, Irish authors, Nationalism in literature, Identity (Psychology) in literature