Words aren't language; an example of a "natural" languages invented today can be found in http://en.wikipedia.org/wiki/Nicaraguan_Sign_Language http://en.wikipe

Words aren't language; an example of a "natural" languages invented today can be found in http://en.wikipedia.org/wiki/Nicaraguan_Sign_Language http://en.wikipedia.org/wiki/Nicaraguan_Sign_Language. Many creoles follow the same pattern of spontaneous development. This is a distinct difference from the inventedness of Esperanto or Lojban. Artificial languages don't spread because they don't solve anyone's problem; they solve everyone's problem.