A device that automatically translates other languages instantly still seems like science fiction, even today. But we are getting very close. Check out NEC’s Tele Scouter. It’s a retinal-display that translates what people say to you by displaying the translations as text on your glasses.
It looks pretty bulky still, but even at that size it is impressive. It requires a computer to be hooked up to the glasses to do the bulk of the work. And even then, the translations aren’t good enough yet to make wearing this thing practical. But soon it will be.
It’s what the members of the UN will be wearing a few years from now.