Official language to the government in their native languages. In countries that do not formally designate an official language, a "de facto" national language usually evolves. English is the most common official language, with recognized status in 51 countries. Arabic, French, and Spanish are also widely recognized. An official language that is also an indigenous language is called "endoglossic", one that is not indigenous is "exoglossic". An instance is Nigeria which has three endoglossic official languages. By this the country aims to protect the indigenous languages although at the same time recognising the English language as its lingua franca. Around 500 BC,
Zambia the world's fastest economically reformed countries. The Common Market for Eastern and Southern Africa (COMESA) is headquartered in Lusaka. The territory of what is now Zambia was known as Northern Rhodesia from 1911. It was renamed Zambia at independence in 1964. The new name of Zambia was derived from the Zambezi river (Zambezi may mean "Grand River"). The area of modern Zambia is known to have been inhabited by the Khoisan until around AD 300, when migrating Bantu began to settle around these areas. These early hunter-gatherer groups were later either annihilated or absorbed by subsequent more organised Bantu groups.