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,
Economy of Chile the northern half of Chile cultivation is highly dependent on irrigation. South of the Central Valley cultivation is gradually replaced by aquaculture, silviculture, sheep and cattle farming. Chile is the second largest producer of salmon in the world. As of August 2007, Chile's share of worldwide salmon industry sales was 38.2%, rising from just 10% in 1990. The average growth rate of the industry for the 20 years between 1984 and 2004 was 42% per year. The presence of large foreign firms in the salmon industry has brought what probably most contributes to Chile's burgeoning salmon production, technology. Technology transfer