English is the largest of the human tongues, with several times the vocabulary of the second largest language - this alone made it inevitable that English would eventually become, as it did, the lingua franca of this planet, for it is thereby the richest and the most flexible - despite its barbaric accretions…or, I should say, because of its barbaric accretions. English swallows up anything that comes its way, makes English out of it. Nobody tried to stop this process, the way some languages are policed and have official limits…probably because there never has been, truly, such a thing as ‘the King’s English’ - for the King’s English was French. English was in truth a bastard tongue and nobody cared how it grew…and it did! - enormously.
Anybody who thinks contacting remote peoples and integrating them into our society is of course an unalloyed good why wouldn’t they just love it, needs to consider the science fiction scenario where aliens land, announce we’re part of the Galactic Community now, thousands of moralizing alien anthropologists will be along next week to tell us how much everything about our culture sucks and has to be changed, our diet is going to be replaced with Galacta-Brand Protein Paste (which is edible for humans, but just barely),and you’re all out of work because Earth industry can’t compete with superior and cheaper galactic imports that will be flooding the planet soon. Oh and the mineral rights to Earth happpen to belong to the Zlorpians three stars over. The mountain-smashers will be landing on Tuesday. The good news is, we can now cure the common cold! You can’t afford it, though, so don’t ask.
Because even sans the forcible conquest, genocides, and displacements of the past–which are not nearly far in the past as people like to think, and in some places aren’t even in the past at all–catapulting an entire culture and people into a complete different context which drowns them out and overwhelms them is not a recipe for harmony and prosperity. And that’s even before the bright-eyed bureaucrats show up wielding clipboards and announce that your land belong to Brazil or Papua New Guinea or wherever, and you are under the authority of people thousands of miles away who you never heard of until this very moment.
(Or just go watch the new Rick and Morty episode, which summarizes this all succinctly in about three minutes of screen time.)