Handle when a language isn't supported or available

This handles the cases when either a language isn't supported (yet) or a language isn't selected/detected.

For now, just logging to the console until a proper UI is introduced for this.

![handle_null](https://f.cloud.github.com/assets/836375/2303035/0bee7816-a19b-11e3-8266-f0a4768baa9f.gif)