Which is my next point. The Internet isn't the first translated thing. You said countries should focus on their own language but that's absolutely bs. As if you've never read something originally written in another language.
I kno a fair amount of Latin from my exposure to the stuff written during the era when all intellectuals had to know Latin or Greek - should we do that again? That was nice and uniform for the Western World at least.
For the record, by using English to make their content accessible to the global population, I have been exposed to more Chinese culture than China could ever hope. I watched Three Kingdoms and the Qin Dynasty series and the Kings War - that's over 350 hour long episodes of Chinese history I've now seen - I only knew Three Kingdoms before hand. So you are wrong about that also. Additionally, I'm developing an appreciation for Mandarin itself, as far a language goes it seems to be as expressive as English and the Chinese speak in idioms just like Americans but obviously different idioms, so I now also understand that to truly appreciate Chinese content, just like American content, I do need to know the language it was made in.
Lastly, the US was a single vote from German being the official language of this country, it's why we have no official language now. So I disagree with direct correlation of language and culture - it's often related but not always and English is an exception as today we live in a world where English is often used by people from countries that do not speak English to do business with other countries that do not speak English.