I put possibility to traverse back in dictionary lookup history on wishlist many months ago. (I use mainly explanatory dictionaries because translation dictionaries to my mother tongue are of very limited quality and so I sometimes need to translate words in explanation and after that return back to main explanation text. It is possible to get translation of word in explanation text (even recursively), but it is not possible to return back.)
I do not know if it is at least the candidate for being implemented one day.
Yours wish is even more difficult to implement, but good idea! I am close to start learning a new language and this might be handy.