On-board translation feature (request)

[gautierchomel]

Message received by email:

Hi using your program to read a book in french. i dont know french so try to copy the text to translate but does not work.
Is there a way for this program to translate the file to english right away?

[gautierchomel]

Word- or sentence-level translations could be helpful, but we consider dictionary features much more critical for comprehension.

[gautierchomel]

Dictionnary feature discussion happens there: #1751