Edit: This feature is no longer functioning on Duolingo.
Does anyone have dictionary codes for the Duolingo dictionary. I don't know how to access it except by bookmark.
Hebrew https://www.duolingo.com/dictionary/he
Swahili https://www.duolingo.com/dictionary/sw
French https://www.duolingo.com/dictionary/fr [This appears to be the default]
Finnish https://www.duolingo.com/dictionary/fi
Klingon https://www.duolingo.com/dictionary/kl
Latin https://www.duolingo.com/dictionary/la
Spanish https://www.duolingo.com/dictionary/es
Korean https://www.duolingo.com/dictionary/ko
German https://www.duolingo.com/dictionary/de
Hungarian https://www.duolingo.com/dictionary/hu
Ukraine https://www.duolingo.com/dictionary/uk
Italian https://www.duolingo.com/dictionary/it
Yiddish https://www.duolingo.com/dictionary/yi
Russian https://www.duolingo.com/dictionary/ru
This is what I got so far with guess work. The dictionary is a window into the sentence discussion at the moment. You can click on related discussions and it will bring up sentences that use the word.
Personally I like the dictionary if I know I've learnt a word but can't remember it or need the spelling.
Note: The dictionary can be accessed from the events more... drop down menu. I was not aware of this when I wrote this. It will adjust automatically to your current language when used this way.