Swahili language
The exact number of Swahili speakers, be it native or second-language speakers, is unknown and a matter of debate. Various estimates have been put forward and they vary widely, from 50 million to over 100 million. Swahili serves as a national language of four nations: Tanzania, Kenya, Uganda, and the DRC. Shikomor, the official language in Comoros and also spoken in Mayotte (), is related to Swahili. Swahili is also one of the working languages of the African Union and officially recognised as a lingua franca of the East African Community. South Africa legalized the teaching of Swahili in South African schools as an optional subject beginning in 2020.
Francization
French became the most spoken language in Africa after Arabic and Swahili in 2010. The number of speakers changed very rapidly between 1992 and 2002, with the number of learners of French in sub-Saharan and southeastern Africa increasing by 60.37%, from 22,33 million to 34,56 million people.