We (and the Aussies, Kiwis, Canucks, etc., etc.) share a beautiful, rich language. But the attitudes of some of you seem more than a little reluctant to admit that it is shared. You do not own it. Neither do we. Admittedly, your ancestors (and mine) invented it. But they also spread it around the world. And it is too late to take it back and hoard it all to yourselves.
I could cite many examples of this attitude, but let me pick the example that caused me to write this plea. I am not linking to this specific example, since it would be unfair to single this individual out.
"[T]he extent to which the English language suffers Americanisms – incorrect, sloppy grammar and words that simply do not exist in the English language – is enough to make you wince."
What makes me wince is the attitude that English needs to be protected from her speakers. English is the language that it is today because of her inventive speakers. If English speakers were as rule-bound as this attitude would have them be, we would never have the tongue we have today.
I admire stylish and well-crafted prose as much as the next person. But the rules of English grammar are constantly changing. Correct usage today is not the same as 100 years ago, and in 100 years it will be different from now. English even changed before there were any Americans, believe it or not. And a good thing, too.
And silliest of all is to complain about using "words that simply do not exist in the English language"! English speakers love to invent new words. Would you really deny all of us that right? You do realized that by condemning the use of "words that simply do not exist in the English language" you are also condemning our greatest writers, including Shakespeare? Just take a look at this "List of English words invented by Shakespeare. Are you really going to tell me that no one should use "quarrelsome" or "sanctimonious"? How else am I going to describe your behaviour?
English is a great democratic institution. We have never taken the view of that we need to protect English from foreign words. We seek out foreign words to enrich our vocabulary. Actually, "we should say that English aggressively mugs other languages for their lexical treasure". I'm proud of the contributions of my countrymen and women to English and grateful for those of English speakers around the world, past, present and future.