From an outsider perspective, the time it took for British media and the political class to take note of the European sentiment on the issue of brexit was around 1 year. It was as if they just found out there was an non-English web out there..
Maybe the US has a higher number, but a lot of those are due to family, not to education.
We already have many localised Englishes across the world, American, Australian, Indian, various pidgin English, but also in politics, business, social media there are "New Speak" version of English in those contexts.
One of these will evolve to be the lingua franca of the young connected people and dominate. And then be superseded by the next evolved language.
Once we colonize Mars and elsewhere there will be some interesting forks in languages I am sure.
As polyglot speaker, I am really thankfully to have been brought up learning multiple languages.
English only got relevant during the last century, and as human history is full of different kinds of lingua francas throuhout the milenias, others will follow.