Swahili

Swahili, also known as Kiswahili, is a Bantu language originally spoken by the Swahili people, who are found primarily in Tanzania, Kenya, and Mozambique (along the East African coast and adjacent littoral islands). Estimates of the number of Swahili speakers, including both native and second-language speakers, generally range from 150 million to 200 million. Most native speakers reside in Tanzania and Kenya.

Around 40% of Swahili vocabulary consists of Arabic loanwords, including the name of the language (سَوَاحِلي sawāḥilī, a plural adjectival form of an Arabic word meaning 'of the coasts'). Swahili also has a significant number of loanwords from Portuguese, English and German. The Arabic loanwords date from the era of contact between Arab slave traders and the Bantu inhabitants of the east coast of Africa, which was also the time period when Swahili emerged as a lingua franca in the region.

Due to concerted efforts by the governments of Tanzania and Kenya, Swahili is one of three official languages (alongside English and French) of the East African Community (EAC) countries, which are Burundi, the Democratic Republic of the Congo, Kenya, Rwanda, Somalia, South Sudan, Tanzania, and Uganda. It is the lingua franca of other areas in the African Great Lakes region and East and Southern Africa. Swahili is also one of the working languages of the African Union and of the Southern African Development Community. The East African Community created an institution called the East African Kiswahili Commission (EAKC) which began operations in 2015. The institution currently serves as the leading body for promoting the language in the East African region, as well as for coordinating its development and usage for regional integration and sustainable development. In recent years Somalia, South Africa, Botswana, Namibia, Ethiopia, and South Sudan have begun offering Swahili as a subject in schools or have developed plans to do so.

Shikomor (or Comorian), an official language in Comoros that is also spoken in Mayotte (Shimaore), is closely related to Swahili and is sometimes considered a dialect of Swahili, although other authorities consider it a distinct language. In 2022, based on Swahili's growth as a prominent international language, the United Nations declared Swahili Language Day as 7 July to commemorate the date that Julius Nyerere adopted Swahili as a unifying language for Tanganyikan independence struggles.