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,
Bicentennial of Chile were submitted in 2009, and were created by Andrea Barreda (Basic Education), Javiera Monreal (High School), Joshua Arevalo (Higher Education), and Patricio Díaz (Visual Artist). The Bicentennial stamp series was officially launched on October 15, 2009. On April 20, 2009, Correos de Chile launched a special issue of 15 stamps that were used for the centenary celebrations of Chile. The stamps, dating from 1910, bore the official logo of the Bicentennial, and were sold for 310 Chilean pesos (US$0.62). 30,000 copies were printed. A stamp with the official logo of the Bicentennial was also released. The Chilean Mint (Casa de