TED: Ajit Narayanan: A word game to communicate in any language - Ajit Narayanan (2013)

Summary: While working with kids who have trouble speaking, Ajit Narayanan sketched out a way to think about language in pictures, to relate words and concepts in "maps." The idea now powers an app that helps nonverbal people communicate, and the big idea behind it, a language concept called FreeSpeech, has exciting potential.