I've tried exporting highlights but all I got was a list of mis-spelled words.... It would have been nice if they were at least links that would take me to the location of the word.
But I agree with Derrell....the IDEAL solution would be letting me correct the word as I was reading on my phone/ipad or whatever. Spell checkers don't know when it is a good word used incorrectly. ...for that matter, neither do a lot of authors...