Thanks EVERYBODY.
As a matter of fact, I installed
Smirnitsky (RU-EN) dictionary on my old Kindle and it deals properly with some declension. Still, it doesn't offer any translation at all for such an easy and common word as собирали. It's better than nothing but I'm quite disappointed.
I dowloaded it here:
https://kindle.userecho.com/communit...indle-keyboard
About
Abbyy, I followed the procedure on amazon (Digital Contents > Manage Your Contents and Devices > Books > Dictionaries & User Guides >) but I still don't find that dictionary, maybe it's a problem of country restrictions?
I'm still following this topic in order to finally find a proper dictionary to comfortably read books in russian while still a begginner.