Language inclusion criteria

Principle: As my heart dictates.

Guideline: I tend to pick up a language that meets one of the following conditions:

• Its implementation is available by default in the latest Ubuntu.
  • main/restricted/universe/multiverse are all OK.
  • I'm too lazy to add PPA.
• It is a famous esoteric language and its implementation can be easily bundled.
  • Whether it is "famous" or not, is determined from my point of view.
  • "Easily bundled" means that there is a small (<1 MB) tarball of its implementation with a free license, or that I can write my own tiny implementation (about ~100 lines in Ruby, normal coding style :-).