This Day in History: Esperanto Language Begins with Book Published in Warsaw
On July 26, 1887, a book titled "International Language. Preface and Complete Textbook" was published in Warsaw, introducing an artificial universal language created by Dr. Esperanto (Ludwik Lejzer Zamenhof), which later became known as Esperanto.

On July 26, 1887, in Warsaw, a book was published that would give rise to a new language. The work, entitled "International Language. Preface and Complete Textbook," was authored by a person calling himself Dr. Esperanto, whose real name was Ludwik Lejzer Zamenhof. This book presented a constructed universal language intended for international communication, which later became known simply as Esperanto. The book contained a preface and a complete grammar guide, laying the foundation for the language's spread. This event is considered the birth of Esperanto, a language designed to bridge communication gaps between speakers of different native tongues. Esperanto continues to be used today around the world, and July 26 is celebrated as Esperanto Day.


