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  1. Esperanto - Wikipedia

  2. Esperanto - Simple English Wikipedia, the free encyclopedia

  3. Esperanto language and alphabet - Omniglot

  4. What Is Esperanto, And Who Speaks It? - Babbel.com

  5. Home - Esperanto

  6. Esperanto | International, Constructed & Artificial | Britannica

  7. About Esperanto - Esperanto-USA

  8. Bonvenon al Esperanto-USA! - Esperanto-USA

  9. History of Esperanto - Wikipedia

  10. A brief history of Esperanto, the - The Conversation