Official language both English and Hindi. The selection of an official language (or no official language) is often contentious. An alternative to having a single official language is "official multilingualism", where a government recognizes multiple official languages. Under this system, all government services are available in all official languages. Each citizen may choose their preferred language when conducting business. Most countries are multilingual and many are officially multilingual. Taiwan, Canada, Philippines, Belgium, Switzerland, and the European Union are examples of official multilingualism. This has been described as controversial and, in some other areas where it has been proposed, the idea has been
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,