Lozi, also known as siLozi and Rozi, is a Bantu language of the Niger–Congo language family within the Sotho languages branch of Zone S (S.30), that is spoken by the Lozi people, primarily in southwestern Zambia and in surrounding countries. This language is most closely related to Northern Sotho (Sesotho sa Leboa), Tswana (Setswana), Kgalagari (SheKgalagari) and Sotho (Sesotho/Southern Sotho). Lozi and its dialects are spoken and understood by approximately six percent of the population of Zambia. Silozi is the autoglottonym  or name of the language used by its native speakers as defined by the United Nations. Lozi is the heteroglottonym.