Spell checker would catch that. spell checkers don't catch misuse of words.
My all time favourite: someone I know spell checked a report for work. Then she skimmed it and caught the words, "doe snot". Took her a while to figure out that the spell checker hadn't caught a misplaced space in "does not".
May you live as long as you wish and love as long as you live.
Robert A. Heinlein