English is the language of business. Nope, can't blame America on that. Blame England and Empire - spreading its culture, language and business across the world it pretty much forced every nation it dealt with to learn English.
Native speaking is not the same thing as 'business'.
http://www.krysstal.com/spoken.html lays out a chart of speakers and where of Native speakers.
Mandarin (Not really Chinese now is it?) Is spoken by roughly 1.151 billion people.
English is only spoken by roughly 1 billion people as a native language.
This list is only composed by nation - it makes the assumption that only that language is spoken by that nation, it takes the population of that nation and adds is.
It does not account for bilingualism, multilingualism or 'pidgin' speakers who have a smattering of words to get by on business trips.
Mandarin is used in some places here in the USA. You can ride the bus in San Francisco and hear nearly every Asian language spoken by American Citizens - granted most are of Asian descent or are in fact immigrants themselves.
I know that in China Town (San Francisco District) Mandarin is spoken, However other Chinese dialects and also spoken and maybe more in use.
I may not be able to list all of them, but I believe that China has a few languages, Cantonese, Hakka, Foochow and Xaing come to mind - I think there is three others (The winkipedia is blacked out tonight so I can check this as fact, sorry).
For the English Language English and only English is used -there may be minor differences such as the Brits calling chips (potato chips) Crisps and Americans calling British Chips french fries, but by and large they are similar enough to be considered the 'same' language.
Other languages spoken in English dominated nations are not considered 'English', AKA Welsh is known as Welsh - no one confuses it for English.