It seems the ability to load external hunspell dictionaries was removed in https://hg.mozilla.org/mozilla- unified/rev/8810007550b1fdeeae0f5d797c4a511818a57be7.
The tracking bug upstream is https://bugzilla.mozilla.org/show_bug.cgi?id=1457321. ** Changed in: thunderbird (Ubuntu) Status: New => Confirmed ** Changed in: thunderbird (Ubuntu) Assignee: (unassigned) => Olivier Tilloy (osomon) ** Changed in: thunderbird (Ubuntu) Importance: Undecided => High ** Bug watch added: Mozilla Bugzilla #1457321 https://bugzilla.mozilla.org/show_bug.cgi?id=1457321 -- You received this bug notification because you are a member of Desktop Packages, which is subscribed to thunderbird in Ubuntu. https://bugs.launchpad.net/bugs/1847247 Title: External dictionaries are not loaded Status in thunderbird package in Ubuntu: Confirmed Bug description: On Ubuntu Eoan and most recent Thunderbird, the external Hunspell dictionaries are not available anymore on Thunderbird for spellcheck. The symlink is still in place: lrwxrwxrwx 1 root root 20 dec 15 2017 dictionaries -> ../../share/hunspell But data doesn't get loaded for some reason. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/thunderbird/+bug/1847247/+subscriptions -- Mailing list: https://launchpad.net/~desktop-packages Post to : desktop-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~desktop-packages More help : https://help.launchpad.net/ListHelp