Kiu Estas Li

Why is Esperanto called “Esperanto”?

This clip names ten famous men — Gandhi, Einstein, Da Vinci, Darwin — and, among them, Zamenhof, the one whose fame is the language itself. In 1887, the Polish oculist Ludwik Lazaro Zamenhof published his new international language under the pen name Doktoro Esperanto — “Doctor Hopeful.” Readers liked the pseudonym so much they started calling the language itself Esperanto, and the name stuck; it was never Zamenhof’s original title for it.

“Esperanto” comes from esperi, “to hope,” plus the active-participle ending -ant- and the -o noun ending — so the word is built the exact same way as any other Esperanto agent noun, just like kantanto (“a singing one”) from kanti. Zamenhof picked the pseudonym because hope, not linguistics, was the point: a shared second language meant as a bridge between people who didn’t trust each other’s first ones.