1)As expected, English is the most spoken language in the world, with 1.132 billion speakers worldwide. It's also the official language of the sky, so if you're planning to become a pilot, you'll need to learn some English. Amazingly, English never stops growing, and every two hours a new word is created, which is 4000 new words a year. 2)Mandarin is the second most spoken language of the world with 1,117 billion speakers. Mandarin is a tonal language , which means that the meaning of the word changes in the way we pronounce it. It has a set of 50,000 unique characters and is one of the world's most complex languages. Although research has shown that you only need to know 2,500 characters to read 98 percent of Chinese characters. This convoluted language has shown to decrease Mandarin speakers of getting Alzheimer Disease significantly.