Perhaps soon everyone will look, and sound, like a badly sync'd chop-sake movie:

A "Tower of Babel" device that gives the illusion of being bilingual is being developed by US scientists.

Users simply have to silently mouth a word in their own language for it to be translated and read out in another.

At 80% accuracy with a 200 word vocabulary, I'd call it progress but hardly anything I'd want a soldier to use to say, "is that a bomb in your car or are you just glad to see me?"