I'm well aware. But China is also the only country (or even bloc) in the world that's aiming for a fully internal supply chain for high tech. Not sure you can transform basic materials into a laptop (to pick one simple example) at scale without China anymore, but China is on a pretty successful track to do that without anybody else.

Once they get there, I'm not sure they have a lot of motivation left to do high-tech on foreigners' terms and in foreign languages.

While it doesn't follow that "we" need to learn Chinese then, whatever they'll use instead of StackExchange will simply outnumber the English version.