Burkina Faso, officially the Republic of Burkina Faso, is a landlocked country in West Africa. It is surrounded by six countries: Mali to the north and west; Niger to the east; Benin to the southeast; Togo to the southeast; Ghana to the south; and Ivory Coast to the southwest. The country's official language of government and business is French. Roughly 50% of the population speaks the Mossi language natively. Formerly called the Republic of Upper Volta (1958–1984), the country was renamed "Burkina Faso" on 4 August 1984. Its citizens are known as Burkinabé. Its capital is Ouagadougou.