Spoken primarily in Central and South America and in Spain—and by a sizeable and fast-growing population of speakers in the U.S.—Spanish is the first language of more than 350 million people, more than any other language except Mandarin Chinese. It's the official language of twenty-one countries and is one of the six official languages of the United Nations. Furthermore, Spanish is a common second language—the most studied after English, and the third most commonly used on the Internet after English and Mandarin