Idea for a Linux app somebody can steal if they want:
Instant translations - app registers a global shortcut through the xdg-portal (can also be triggered through commandline to support standalone WMs). When that shortcut is pressed a Window pops up translating the text in the primary buffer to the users native language.
That way the user can just select text in any app he wants, press the shortcut and get it translated.
Knievelcat 
@knievelcat@amazonawaws.com