What is your point? People learn what they need to in order to function in a given society.
I know some Korean, some Chinese/Mandarin, some Greek, some German, some French, some Russian and a fair amount of Spanish (California's majority language and all). Others as well.
If I expected to spend anything more than a brief vacation in a country with a primary language other than my own, I would prioritize learning it.
I will bet the farm you met ABSOLUTELY ZERO citizens in China that couldn't speak Chinese or any other country for that matter. Yet the US has millions that can only function with assistance in the Ghettos where they reside.
The very fact that most other nations know basic English is simply a testament to the fact they NEED to know it in order to function well.
Putting aside languages, how many people in the entire world could explain Ohm's law to you? 0.001%... maybe? Ask your Chinese waiter the next time you are in-country.
...Oops, dropped the mic.