Esperantoball is a international auxiliary language languageball that was invented by L. L. Zamenhof in 1887 as a constructed language. None of the countryballs speak Esperanto like official language. He has been heard about in many language organizations.
Esperanto can into EU!
Nowadays Esperanto is the most spoken constructed language in the world, with 2 millions and an half of learners and speakers across 120 nations.