Thanks for your suggestion! We do already have both dictionaries you mentioned available, but not for the Swedish > German combination. I added that combination too now for DeepL dictionary. However, the Folkets dictionary doesn't support Swedish > German. Swedish > English combination is already available.
Ah, of course, I didn't think about separate language settings because I'm using LingQ itself in English, sorry. A good Swedish-German dictionary doesn't seem to exist, even the ones on paper like Langenscheidt are very limited.
Thanks for adding DeepL, it already helped with a few words.
If somebody else with similar problems stumbles upon this thread: I just discovered that I can add English dictionaries as well despite having my language set to German. I always thought that changing the language in the dictionary popup would change the language of the words I add but it's just for the dictionary itself. For Swedish I now have some German dictionaries and the English Folkets dictionary. Of course I still have to translate the English results to German by myself for this setting.
Now I understand why I have a lot of English entries in the German translation of Swedish words; some people here seem to use English dictionaries and don't translate them. I always wondered as I don't have that effect for Japanese, French and Spanish where the German dictionaries are quite good and where's no need to add English ones. :-)