Stonetown of Zanzibar, also known as Mji Mkongwe, is the old part of Zanzibar City, the main city of Zanzibar, in Tanzania. The newer portion of the city is known as Ng'ambo, Swahili for 'the other side'. Stone Town is located on the western coast of Unguja, the main island of the Zanzibar Archipelago. Former capital of the Zanzibar Sultanate, and flourishing centre of the spice trade as well as the Indian Ocean slave trade in the 19th century, it retained its importance as the main city of Zanzibar during the period of the British protectorate. When Tanganyika and Zanzibar joined each other to form the United Republic of Tanzania, Zanzibar kept a semi-autonomous status, with Stone Town as its local government seat.

Swahili, also known by its local name Kiswahili, is a Bantu language originally spoken by the Swahili people, who are found primarily in Tanzania, Kenya and Mozambique. The number of current Swahili speakers, be they native or second-language speakers, is estimated to be over 200 million, with Tanzania known to have most of the native speakers.