There is only one ' class ' , as you call it. It is commonly known as the ' correct ' way to write English.
But then, you and me can be forgiven for our ignorance...after all, as you say, you are not English.
Me....all this is new to me. I write and speak a language rooted in the Armaic and Semitic Scripts.. My Language continues to be spoken and written in common and official everyday life unchanged and understood as it was thousands of years ago.
By the way, the word ' camera ' is derived from my Language. It means a dark room.
Live and learn.
Agreed that in the sentence you pointed out, I should have not used an uppercase ' i ' for the word ' incorrectly '. The quotes are necessary to indicate something specific.
p.s. Or should I have said ' I should not have used an uppercase ...in the sentence above?
p.p.s ' say ' or ' write '? It is so confusing