I have nothing against Coffeescript, and use it myself sometimes. But please don't respond to something about "js" and then put down a single coffeescript snippet with no additional context. It's very confusing.

I had to re-read the last line several times before I looked up at the function arrow and realized it was coffeescript, and that the "@" were not part of the i18n library, but rather the syntactic sugar for "this".