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,
Tonga language (Zambia and Zimbabwe) Tonga language (Zambia and Zimbabwe) Tonga ("Chitonga"), also known as "Zambezi", is a Bantu language primarily spoken by the Tonga people who live mainly in the Southern and Western provinces of Zambia, and in northern Zimbabwe, with a few in Mozambique. The language is also spoken by the Iwe, Toka and Leya people, and perhaps by the Kafwe Twa (if they are not Ila), as well as many bilingual Zambians and Zimbabweans. It is one of the major lingua francas in Zambia, together with Bemba, Lozi and Nyanja. The Tonga of Malawi, which is classified by Guthrie as belonging to