Even though the 1st run of Gramps on MS Windows now creates an %LocalAppData%\Local\Enchant folder with blank user dictionaries, it also creates an unused %AppData%\Microsoft\Spelling folder in the Roaming profile.
This seems to be a leftover from the previous SpellCheck libraries.
Tested on a fresh Window10Pro system and 15Sep build of the AIO package.
Since the bug has been confirmed and isolated, a bug report #13031 (Initial run of Gramps creates a Spelling user dictionary directory) has been filed.
Closing this thread as ‘solved’ since tracking is done in MantisBT.
This %AppData%\Microsoft\Spelling appears to a be shared or ‘teams’ dictionary for Windows.
Could a macOS user identify the paths for user dictionaries in that OS?
a posting about enchant or hunspell for Emacs suggested:
~/Library/Spelling
/Library/Spelling
Information to be integrated in Troublesoot Spellcheck article.
I have a ~/Library/Spelling folder. I do not have a /Library/Spelling folder on my Mac.