Esperanto

Esperanto is the most widely spoken constructed international auxiliary language in the world.

Quotes

 * Esperanto was a very useful language, because wherever you went, you found someone to speak with. -- George Soros
 * "How Do You Say ‘Billionaire’ in Esperanto?" in The New York Times (December 16, 2010)
 * Asked about what impresses her most about Esperanto conferences:
 * With Esperanto conferences, it was the level of fluency. I sort of thought it would be like watching a video of "Chapter 1 Dialogue" in a language class, like "Where is the library?" But it was very fluid, like watching someone speak Spanish. So seeing that happen convinced me that it's a real language; it's not people playing dress-up with a different vocabulary.
 * Arika Okrent Author of “In the Land of Invented Languages” May 2009, Random House. From a Time Online interview By M.J. STEPHEY Monday, May. 18, 2009
 * ESPERANTO: Universal language known by nobody in the universe. (original ESPERANTO: Idioma universal que no conoce nadie en el universo.)
 * Enrique Jardiel Poncela Para leer mientras sube el ascensor (1932)