I gave this lightning talk at the 2012 Polyglot Conf in Vancouver (http://lanyrd.com/2012/polyglotconf/). A friend in the audience caught it on his cell phone. Use full screen so you can read the text. Also see https://www.youtube.com/watch?v=8Skdf...
Part of the last language (a NSFW implementation of quicksort in J http://www.jsoftware.com/jwiki/Essays...) and my conclusion were cut off.
See https://www.youtube.com/watch?v=8Skdf... for a longer Pycon 2013 talk that explains why and how I code by voice. Follow https://github.com/tavisrudd/ for updates on the code behind the speech recognition coding system.
Pedantic viewers will note that there were actually 6 languages: Python, Clojure, Bash, Javascript, Cobol and J. Clojure and Javascript were canned examples so I only counted them as 1/2 each.