Bongolala unajua maana ya neno ethnicity kweli. Hivi, hujui kwamba Yoruba is an ethnic group in itself?
Let me break it up for you a little bit. Sukuma, Kikuyu, Igbo, Luo, Pokomo, Shona etc are all African ethnic groups found in different parts of the continent.
Unachoita ethnic group in this case is a language group. Examples of language groups in Africa are Cushites, Bantus and Nilotes. These are not ethnicities; they are language groups. For example, Luos belong to a language group called Nilotes, Sukumas are Bantus, et al.
I hope you've understood now