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First-language speakers: 339 000 000. English is the most spoken language in the world but as we count only first-language speakers it is on the 3rd place. English is spoken in 101 countries and is an official in 94 states (67 sovereign states and 27 non-sovereign entities).
Mandarin is the most common language in the world as it is the official language of Mainland China, Taiwan, and one of the official languages of Singapore. Thus, Mandarin is commonly referred to as Chinese.. But in fact, it is just one of many Chinese languages. China is an old and vast country geographically speaking, and the many mountain ranges, rivers, and deserts create natural regional borders. Overtime, each region has developed its own spoken language.