Which Is The World's Most Spoken Language? Terpene. What's That, You Ask?

China, the most populous country in the world, has close to one billion people that speak Mandarin. Spanish is spoken by a less than half that number, primarily in Mexico, Spain and the countries in South America. English follows close behind, with Hindi in India and Arabic in the Middle East making up the top five. Or so you would think. The most common language in the world is actually not human at all.