You can see the list of languages in .js file stored in `langs` variable: http://wtpl.heroku.com/js/engine.js

What with that link just sitting there out in the open, I want to clarify that it's transpiled CoffeeScript and that the original[1] is far more sane.

[1] http://wtpl.heroku.com/js/engine.coffee

"transpiled" is not a word found in any dictionary I know.

Language constantly evolves, and I reckon there's certainly enough room for "transpile" somewhere in that process. CS -> JS isn't quite translation (much of it stays the same) and it's hardly compilation (but that seems to be the accepted term), so I feel "transpile" is perfectly suited.