Es·pe·ran·to /ˌɛspəˈrɑn(ˌ)to, ˈræn(ˌ)to/
 世界語
 Es·pe·ran·to n. An artificial language, intended to be universal, devised by Dr. Zamenhof, a Russian, who adopted the pseudonym “Dr. Esperanto” in publishing his first pamphlet regarding it in 1887.  The vocabulary is very largely based upon words common to the chief European languages, and sounds peculiar to any one language are eliminated.  The spelling is phonetic, and the accent (stress) is always on the penult.  A revised and simplified form, called Ido was developed in 1907, but Esperanto remained at the end of the 20th century the most popular artificial language designed for normal human linguistic communication. -- Es*pe*ran*tist n.
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 Esperanto
      n : an artificial language based as far as possible on words
          common to all the European languages