I think it would be more useful if auto-completion did not accept mispelt words on the list unless the user so decides. Auto-suggestions often are, anyway, many and undesirable items on the list make the situation even worse.
A very good suggestion!
Misspelled words are removed automatically from the Autocompletion list when confirming the segment - see the update 5 of CafeTran Espresso 2018 Akua version. Thanks!