Interesting...
... this documentary was something I missed. And it would not be surprising at all. Consider, how all over the US - and especially in SoCal it seems as if its' common knowledge that learning SPANISH is a practical consideration. With so many from our neighboring country it is obvious that speaking Spanish is a practical skill.
Chinese however seems less likely as a language in UNIVERSAL demand in the USA. Now - from casual observation I can understand how "nationalistic" attitudes from the Chinese leadership want to export the Chinese language. However, the reality comparing per capita GNP tell me it is an exercise in vanity. HOWEVER... with Spanish... this is something that you and I might make use of in our own back yard given there are so many individuals whom we might converse with for practical needs. IE... you might need to employ or converse with someone who speaks Spanish here - where we live. Or at least - you might want to understand more of what might be said in your prescence here by folks speaking Spanish.
At any rate... my interest in Chinese school goes beyond mere language. It is a matter of cultural heritage - and that it gives my kids a mental exercise to build their academic potential on. Plus it happens to be something I wish I had personally done when I was younger. It would have been far better for me when I was a kid IF my parents made the decision to make me attend more classes in Chinese school. It's not enough to me to simply be conversant - which I am in a single dialect. I would rather have a diverse capability with reading, writing and being conversant in the more common dialects of Chinese. MY dialect is not very common. And - if I had some reading and writing skill then it would obviously be better.
On the other hand - I can see how the REVERSE is true - that if 1/5th the world population spoke a different language - and I could not converse or simply understand them - and IF I wanted to do business with them - then it makes a compelling arguement to be able to converse with folks who spoke that language. However, be aware there are supposedly in excess of 100+ dialects of Chinese. Some are so different form the other as to not be understandable from one to the other. So it is not enough to just be fluent in Cantonese or Mandarin. Alas, being flent in both of these would be awfully good to start with.
Long ago businesses have set up units to produce goods in China. And those businesses are mostly thriving. And businesses that have not lowered thier production costs may be threatened by an uncompetitive labor cost. One of the companies I work with tried to shift 2000 call center jobs from the USA to India. They cited how the average US employee cost $32000 while a better educated employee could be had for less than $3000. And for that $3000 the Indian employee would be very well motivated as that was really "rich" wages... compared to $32,000 in the US was not as encouraging. Alas... in the end I think some of the jobs came back to the US as there was a considerable resistance from the remaining US based employees. And general fear of losing ones' job eventually. A fear which I think was well founded.
So - the economic gradient with many lower cost basis countries is not limited to China or India. It's just that certain countries make for fertile grounds with which to do business.
Looking at the table above - all the countries in the 1st quadrant would be great candidates to do business with as labor sources. That is... IF they had stable exchange rates, an educated and industrious population, plus a long list of other traits and considerations necessary for effective business results.