Sorry it took so long to get back to you. I had to take a hiatus from skyrim due to real life. I've tried all of the above and, even on a fresh install, I'm still getting guards and townsfolk omitting random words or syllables in their dialogue. EDIT: This is a relatively new issue as well. I'd been running Skyrim on this rig for over a year with no issues. There had been no new mod downloads nor any changes to the system itself when the dialogue issues began. Example: "Now I remember... you're that new member of the --------ns. So you, what... fetch the mead?" ("Now I remember... you're that new member of the companions. So you, what... fetch the mead?")