Romansh language German is also acquired in two varieties: Swiss German and Standard German. Additionally, in Val Müstair many people also speak Bavarian German as a second language. Aside from German, many Romansh also speak additional languages such as French, Italian, or English, learned at school or acquired through direct contact. The Swiss census of 1990 and 2000 asked for the "language of best command" as well as for the languages habitually used in the family, at work, and in school. Previous censuses had only asked for the "mother tongue". In 1990, Romansh was named as the "language of best command" by
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,