"Security is more important than usability. In a perfect world, no one would be able to use anything!"

In the past, I've used MORT to play some Japanese MMO game. In-place overlay makes it easier to actually play the game instead of doing dictionary lookup on the side.

These days I stopped using realtime translator and just embrace the slow pace of learning these languages while enjoying the game story.

MORT: https://github.com/killkimno/MORT

I imagine this is more for turn based games though.