How to add a dictionary to an e-book?

Question

Android

book tolino page 2
there is no Russian in the interface languages, but I don’t need
it, only for the translator I
download dictionaries from here https://github.com/rdoeffinger/Dictionary/releases... dictionaries, copy them to the book and she sees them,
or rather, sees only pairs en-de, en-fr, de-sp, de-it, etc., those 5 languages, each with each,
how can I take en-ru from github and name it en-fr, let's say, and let him think that he translates into French? I tried to open it with a text editor and replace ru with fr but this is not enough,
maybe someone has an editor and can create a small * .quickdic file called FR but in fact the translation into RU with a couple of words and I will try to fill it in?
Or how can I cheat this case?
Thank you