Chinese is the Most Native-spoken Language in the world. (955 millions)
Second is Spanish (~500 Millions)
Thrid is English (~360 Millions)
English is the most Spoken in the world (by count or by Official Language)
Native + second + EFL (English as Foreign language or Official Language) are (360 million + 350 million + 750 millions)
Too much to list read this
List of countries by English-speaking population - Wikipedia, the free encyclopedia
total 1.4/1.5 billions
Chinese is the second most spoken language in the world
Native + second + CFL (Chinese as Foreign Language or Official Language) are (955 millions +~8 millions + ~5 millions)
Native - 955 million
Second (De-facto Official) - 8 millions (Hong Kong/Macau SAR)
Third language or immigrant Language - ~ 5 millions (US 2.8 millions, Canada 280,000, UK, < 100,000, Australia <400,000, rest of world < 1 million)
total 973 millions
third is spanish ~ 750 millions (native + mostly Immigrant in EU+American)
It's very hard to learn Chinese for a Westerner, unless you spend a considerable time in China, otherwise no westerner can Master the CHinese language.