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.
Demographics of Switzerland
The non-official language with the largest group of native speakers is Serbo-Croatian with 103,000 speakers in 2000, followed by Albanian with 95,000, Portuguese with 89,500, Spanish with 77,500, English with 73,000, Macedonian 61,300, and a total of 173,000 speakers of other languages, amounting to roughly 10% of the population with a native language not among the four official languages.