I tried to lingQ few words today but the dictionnary showed no translation. Never.
When that happens to me (for several seemingly common words in a row) I keep them and look them up later, or with the help of another dictionary.
There seems to be an issue with Babylon right now. It’s not working well. There is not much we can do about this. Please just use the external dictionaries and User Hints for now. I am able to get some definitions but not many. Sorry about that.