Esperanto

Esperanto is a language that was developed in 1887 by Ludwik Zamenhof with the specific intent of creating an international second language. In 1905, Zamenhof published his Fundamento de Esperanto, which lays down the basic principles of the language's structure and formation.
Esperanto is probably the most successful of the artificial international languages. The number of Esperanto speakers is estimated at more than 2 million. The Universala Esperanto-Asocio (founded in 1908) has members in 83 countries, and there are 50 national Esperanto associations that use Esperanto. There is an annual World Esperanto Congress, and over 100 periodicals are published in the language. More than 30,000 books have been published in Esperanto

Esperanto is the most widely spoken constructed international language. The name derives from Doktoro Esperanto, the pseudonym under which L. L. Zamenhof first published the Unua Libro in 1887. The word itself means 'one who hopes'. Zamenhof's goal was to create an easy and flexible language as a universal second language to foster peace and international understanding.