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,
Languages of Egypt the Red Sea. Some 234,000 (2004) Dom speak the Domari language (an Indo-Aryan language related to Romany) and are concentrated north of Cairo and in Luxor. About 30,000 Egyptian Berbers living in the Siwa oasis and its surroundings speak Siwi Berber, which is a variety of the Berber language of North Africa. Siwi Berber is well mutually intelligible with Libyan Berber dialects. In ancient times, the population of western Egypt was probably made of Berber-speaking tribes. Immigrants and their descendants mainly speak Greek, Armenian, Italian, or also more recently African languages like Amharic and Tigrigna. Egypt was occupied by the