To begin with, I've tried in futility to search everywhere else on the internet to fix this, so I'm asking here now.

I have a Nexus 4 running Android 4.4. Sometime within the past year, DONT started appearing as a word in my autocorrect options. IIRC, it began appearing immediately after an OS upgrade (I'm thinking the 4.3 release).

Screenshot:

I do not have DONT in any user dictionaries on the device. I have exhaustively searched all user-level language/dictionary settings and cannot find this anywhere. It's really annoying because it takes over the default correction of don't, so I just end up looking stupid.

(Here is my personal dictionary listing [one item redacted]):

If DONT were here it would be between Catan and Dropbox

Is there some other/hidden location where dictionary/replacement text gets stored? And/or does anybody have another suggestion for how to get this stupid word removed from my device?