Esperanto is an international constructed language that was created in the late 19th century by Dr. Ludwik Lejzer Zamenhof. It was designed to serve as a universal second language, aiming to facilitate communication and understanding between people of different linguistic backgrounds. The word "esperanto" itself means "one who hopes" in the language.
Note: The provided meaning of the answer is for the latest New York Times crossword puzzle clue: Language in which "crossword puzzle" is "krucvortenigmo". Explanations are generated by AI and may be inaccurate.