I thought I was a very good speller, that is, until I got a spell check on my computer and discovered that I had been spelling, well, imaginatively.
On my Mac here, on top of the screen is the tool bar with one that says EDIT, and on that EDIT, among other things, a spelling and grammar check/changer/suggestion maker. I can choose any of those I want. And while writing in a book, I can over power it and insist on regional accents, which it does not like. It doesn't like it when I say it don't make me no never mind...but if I want it there it will darn well stay.
I really have to be careful about spelling...it LOOKS better done my way most of the time, in spite of what the spell checker says.