Spell checker won’t catch words that are spelled correctly for a different usage. My email program doesn’t catch i for I either, sigh- but CC has automatically capitalized the small one sometimes (took three tries for it to just leave it with a red underline)- and CC catches it. I am also frustrated when the silly whatevers at the end of the first line prevent me from checking a word there. Plus, misspell/typo finance as fiancé and the accent appears over the e- using English, not French, thank you (and the accent doesn’t seem to disappear either).
Won’t clean up above. Think I capitalized the second I (and got an automatic capital just now, but had to be sure of the capitol/capital spelling myself)- afraid of silly moving symbols.