Typos, of course, aren't spelling mistakes. They are impossible to avoid and we have to tolerate them.
Secondly, the "english" language isn't really english - except as the official language of a political admnistrative area

.
This is going to get heavy
Especially in the 19thC, dialects and languages were "discouraged" and frowned upon because it was believed that areas having their own dialects or language could not be governed so effectively, There were exceptions, but that was the general rule through most of Europe and elsewhere. In other words, the intolerance of local variations in language etc. was a form of
repression. I really think we should get away from thinking in terms of what is correct - there is no authority who can define that since language is something living and expressive - not something that should be controlled by authorities - think of Orwell, 1984, and "
Newspeak".
Thirdly, to back this all up, we have no problem accepting american spelling and vocabulary.
You see - the most important thing is simply to communicate - that sometimes requires extra effort from the person doing the talking or writing and also sometimes extra effort from those listening or reading - this is called understanding - and we need more communication between people and peoples and much more understanding - something that improves with practice.
Care for the way you speak, be creative and it can become something beautiful - poetry. But don't stop speaking dialect or being creative in your writing - just don't be sloppy about it.
BTW - in the 19thC,
Occitan was considered by the french "authorities" to be a sort of "pidgin" french, the resut of ignorance and laziness. It is now, of course, recognised as a language, It was the language which Richard Cur de Lion (Richard the Lionheart) spoke and it was the language of the
Troubadours - the language of the poets.
Language is something beautiful and precious - we don't want to lose it like the Cornish did theirs. Be proud of your dialects
Oh, and if americans can spell differently then so can others. Important is only that we all understand each other.
Grammar is not a rule book of how people should speak, it is an analysis of the way people
do speak. If a certain percentage of the people speak or write in a certain way and the dictionaries and grammar books say that is wrong - it is they who are wrong,
If lots of us wrote "wrong" as "rong", then "rong" is a correct spelling of the word.