Esperanto -
an artificial language based as far as possible on words common to all the European languages
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Wikipedia
Esperanto (help·info) is the most widely spoken constructed international auxiliary language. Its name derives from Doktoro Esperanto (Esperanto translates as - one who hopes), the pseudonym under which L. L. Zamenhof published the first book detailing Esperanto, the Unua Libro, in 1887
OmegaWiki Dictionary
Ω
esperanto A widely spoken constructed international language, initiated by L. L. Zamenhof.