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,
Official languages of the United Nations endangered languages. In 2002, it was reportedly proposed to the then current UN Secretary General Kofi Annan that the UN develops a 'Semi-Official' or 'Regional' language status for commonly spoken languages that do not have Official status so that a higher percentage of the worlds population could be familiar with UN actions. As of 2006, the six official languages are the first or second language of 2.8 billion people on the planet, which is less than half of the world population. The list of potential 'Semi-Official' or 'Regional' languages, many of which can be considered lingua francas in their areas,