The only official language of Mozambique is Portuguese, which is spoken mostly as a second language by about half the population. Common native languages include Makhuwa, Sena, and Swahili. The country's population of around  million is composed of overwhelmingly Bantu people. The largest religion in Mozambique is Christianity, with significant minorities following Islam and African traditional religions. Mozambique is a member of the United Nations, the African Union, the Commonwealth of Nations, the Organisation of the Islamic Cooperation, the Community of Portuguese Language Countries, the Non-Aligned Movement, the Southern African Development Community, and is an observer at La Francophonie.