You might want to "but, but" reply to someone who blamed it on spellchecks, then. (-: It's not a confusion, moreover. It's two alternative forms, one with it

You might want to "but, but" reply to someone who blamed it on spellchecks, then. (-: It's not a confusion, moreover. It's two alternative forms, one with its roots in the French influence on the language, one with its roots in the Greek. British English incorporates both, as I said.