Thunderbird 115.7 does not offer suggestions for misspelled words that have been previously added to the user dictionary
When I mistype words that have been saved to the user dictionary, they are not listed in the suggestions in the Check Spelling window, like they are with words that are in the standard dictionaries. Is that a known issue? Thanks
Alla svar (1)
Adding words to the user dictionary only means they aren't flagged as misspelled by the spell check. They aren't added to the list of suggested spellings.
This has been requested for 17 years: https://bugzilla.mozilla.org/show_bug.cgi?id=338291