Why YSK?
The first person who typed “should of” probably heard of it in real life that was meant to be “should’ve”, they typed “should of” online and readers thought that it’s grammatically correct to say “should of” which is in fact wrong and it became widespread throughout the years on Reddit.
I hope something could start to change.
That us just incorrect, his plays marked major shifts in the style of writing for the english language, many writers after him adopted his style and the new mechanics he was making in his plays.
https://online.maryville.edu/blog/william-shakespeare-influence/
It is not incorrect.
True, that is perfectly in line with what I said and contradicts the statement that he "made changes. “making changes” is not the same thing as “marking major shifts”.
Many would imitate his style. But we also know very little about the styles that influenced Shakespeare. New mechanics? Not sure what you mean by that. He did not alter the grammar of English nor did he invent words. When people claim he “invented” words or phrases, what they really mean is that his works are the first recorded example. That is not the same thing as “inventing.”