<P> Esperanto is also the first language of teaching and administration of one university, the International Academy of Sciences San Marino . </P> <P> In the summer of 1924, the American Radio Relay League adopted Esperanto as its official international auxiliary language, and hoped that the language would be used by radio amateurs in international communications, but its actual use for radio communications was negligible . </P> <P> All the personal documents sold by the World Service Authority, including the World Passport, are written in Esperanto, together with English, French, Spanish, Russian, Arabic, and Chinese . </P> <P> Zamenhof's goal to "enable the learner to make direct use of his knowledge with persons of any nationality, whether the language be universally accepted or not", as he wrote in 1887, has been achieved as the language is currently spoken by people living in more than one hundred countries . </P>

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