'''Burkina Faso''' (, ; ) is a landlocked country in West Africa that covers an area of around  and is bordered by Mali to the northwest, Niger to the northeast, Benin to the southeast, Togo and Ghana to the south, and the Ivory Coast to the southwest. The July 2019 population estimate by the United Nations was 20,321,378. Previously called Republic of Upper Volta (1958–1984), it was renamed "Burkina Faso" on 4 August 1984 by President Thomas Sankara. Its citizens are known as ''Burkinabé'' or ''Burkinabè'' ( ), and its capital and largest city is Ouagadougou. Due to French colonialism, the country's official language of government and business is French. However, only 15% of the population actually speaks French on a regular basis. There are 59 native languages spoken in Burkina, with the most common language, Mooré, spoken by roughly 50% of Burkinabé.