Where is the Swedish dictionary? The answers to those questions are invalid and wrong. The correct answer is http://dsso.se/
In two threads this question has been asked and the answers aren't correct.
One answer leads to a stupid download site (to which you have to register and the download is useless). This one: https://support.mozilla.org/en-US/questions/922082
The other answer isn't valid anymore. This thread: https://support.mozilla.org/en-US/questions/924526
The correct way to find the Swedish dictionary is to go to this place: http://dsso.se/
Krejt Përgjigjet (2)
Have you seen this addons? Svenska Language Pack or here How to install Swedish Dictionary
Looks that the Swedish dictionary has been abandoned and is no longer maintained.
I don't know if its development is continued elsewhere.
See:
Extract the two dictionary files (sv_SE.aff and sv_SE.dic) in the dictionaries folder in the ooo_swedish_dict_2-21.oxt ZIP archive and copy them to the dictionaries folder in the Firefox program folder (C:\Program Files\Mozilla Firefox\)
Ndryshuar