It’s been driving me mad - whenever I fill in a form (ie using the gmail interface) Firefox has been defaulting the spell check to en-CU instead of en-GB. It’s an annoyance and usually I’m trying to do something else and don’t much want to look into it. Some google searches seem to have people stuck with different default spellings, but tend to have various solutions or diagnosis instructions specific to other distributions
For the record, in Firefox about:config I had:
spellchecker.dictionary;en-GB
and tried:
intl.locale.matchOS;false
in case that was doing something.
My solution, in the end, was to:
su root
cd /usr/share/myspell
mkdir force_default
cp en-GB* force_default
Then, going back to firefox and typing into the URL bar:
about:config
I changed
spellchecker.dictionary_path from: /usr/share/myspell/
to
**/usr/share/myspell/force_default
**
This problem may be unique to me, or there may be another solution. But it will do for now. You could also just delete all the other dictionaries in /usr/share/myspell, I guess, but I’m a non-destructive sort of guy!