Brazzaville is the capital and largest city of the Republic of the Congo. Administratively, it is a department and a commune. Constituting the financial and administrative centre of the country, it is located on the north side of the Congo River, opposite Kinshasa, the capital city of the Democratic Republic of the Congo.

Kongo or Kikongo is one of the Bantu languages spoken by the Kongo people living in the Democratic Republic of the Congo (DRC), the Republic of the Congo, Gabon, and Angola. It is a tonal language. The vast majority of present-day speakers live in Africa. There are roughly seven million native speakers of Kongo in the above-named countries. An estimated five million more speakers use it as a second language.