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.
Mozambique
The Bantu-group languages of Mozambique that are indigenous to the country vary greatly in their groupings and in some cases are rather poorly appreciated and documented. Apart from its lingua franca uses in the north of the country, Swahili is spoken in a small area of the coast next to the Tanzanian border; south of this, towards Moçambique Island, Kimwani, regarded as a dialect of Swahili, is used. Immediately inland of the Swahili area, Makonde is used, separated farther inland by a small strip of Makhuwa-speaking territory from an area where Yao or ChiYao is used. Makonde and Yao belong to a different group, Yao being very close to the Mwera language of the Rondo Plateau area in Tanzania.