It's aboot time I asked this one. Firefox thinks I'm Canadian.
I've got absolutely nothing against Canadians and their spelling is a lot better than Americans' but I don't spell specialised with a
z. There are other, similar issues where I'm writing something and suddenly the dunce-squiggle pops up.
Anyway... How on earth does one set the default language? Can I remove
English (Canada) completely?
Some clarifications as to why some of these answers aren't right for me, but might be right for somebody else:
Select another dictionary in Firefox by right clicking a textarea — This didn't hold between sessions. I would quit Firefox sipping my cup of tea, start it back up and be halfway through O Canada.
Remove the Canadian dictionary from Firefox — Simple: I didn't have it installed. The only dictionary language pack I had installed in Firefox is GB.
In my case I had somehow installed system-wide dictionary packages for en_CA and en_ZA. I've still no idea why or even how these kept replacing the Firefox default because I also have a system-wide en_GB dictionary package. Very odd. Package.