It's funny because a ton of these common errors are due in a huge part to the fact that we don't use the native alphabet for English. Lots of stuff has to be transposed in creative ways to deal with the romanization of English.

It's much harder for spoken language to be misunderstood among the population that a native grew up in,

Well, there's still register switching, which is an important part of the study of linguistics. A native English speaker might freely switch between the different ways to say the same meaning, depending on context and audience ("sorry" versus "my bad" versus "apologies," or "you're welcome" versus "don't mention it" versus "my pleasure").

There are perceived formalities, common membership in different groups, unspoken social relationships and positions that are reflected in speech.

These systems can be described with rules, and we can recognize that sometimes one register is inappropriate or poorly fit for a particular situation, and that some registers have different rules of grammar.

"Culler" is a word, but it certainly will not be received by a reader as the same word as "color."

That's what I was just saying to you, so I'm confused why you think that's a rebuttal.

You said things people write aren't automatically "correct" without defining what correct means.