Mandarin language – China
The highest number of speakers use Mandarin language the number of speakers are crossed 1 billion plus, it is the most widely spoken language on the planet which is based in the most populated country on the planet, China. Speaking Mandarin can be really tough, because each word can be pronounced in four ways (or “tones”), and a beginner will invariably have trouble distinguishing one tone from another.
To say “hello” in Mandarin, say “Ni hao” (Nee HaOW). The “Hao” is pronounced as one syllable, but the tone requires that you let your voice drop midway, and then raise it again at the end.