"Every other country is practically a net importer of American culture."
You don't get out much, do you? There is no denying that the US does have quite an influence on a global scale - culturally and otherwise but there is, much, much more going on that the US is nothing to do with.
I'm a Brit who grew up in some strange places: one was called West Germany and the other was a series of public/private (that probably does not mean what you think it does) schools in the UK. All the schools I attended in Germany were British and public, except for the modern and comprehensive ones or the primary or secondary ones.
I have two employees amongst 25 Brits (Ok, some are English, some are Irish and some are Scots and there are others who don't care, oh and some are Welsh) who are Polish. Their parents lived behind the Iron Curtain.
Well that's nice but the world is turning and although English is still one of the lingua franca (oh the irony - franca - French) there are more changes afoot and those who are able to keep pace will "win" and those who can't ... won't. Britain has always been flexible, linguistically. English is an outrageous amalgam of many languages with a simple structure and vocab. that stretches (with a bit of a wobble) across the entire globe.
Well, my English is and always has been very flexible - I personally take great delight in flexing my language and frankly torturing it through accent or spelling until it delivers the desired result. Some other Englishs are a bit taut and inflexible. Some are so worried about being associated with "British" that they are starting to sound a bit odd and stultifying - they will fall by the wayside.
Tell me about your cultural views, Mr pjc50