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.
Tswana people
The largest number of ethnic Tswana people actually live in South Africa. They are one of the largest ethnic groups in the country, and the Tswana language is one of eleven official languages in South Africa. There were over 4 million Tswana speakers in the country in 2012, with North West Province having a majority of 2,200,000 Tswana speakers. From 1948 to 1994, South African Tswana people were defined by the Apartheid regime to be citizens of Bophuthatswana, one of ten bantustans set up for the purpose of defending the policy of denying black Africans citizenship in South Africa.