According to a February 25, 2004, press release, the Esperanto version of the Wikipedia (en.wikipedia.org)—an open-content, polyglot encyclopedia—had 11,000 articles, making it the tenthlargest language in the Wikipedia.
The first film produced in Esperanto was called Angoroj (1964). Incubus, produced a year later, starred William Shatner, himself an Esperantist; it is the only known professionally produced feature film with entirely Esperanto dialogue.
Besides Esperanto, the most famous constructed languages are the Klingon and Vulcan languages of the movie and TV series Star Trek, and the languages of J.R.R. Tolkein’s Middle-earth mythologies (Sindarin, Quenya, Khuzdul and others).
The minor planet (1421) Esperanto is named in honor of the language. It was discovered on March 18, 1936 by Yrjö Väisälä, a Finnish astronomer.
Though the United Nations does not recognize Esperanto as an official language, the Universal Declaration of Human Rights has been translated into Esperanto.
Google, the Internet search engine, has the capability of displaying the Google interface, tips, and messages in Esperanto. When using Esperanto as a search keyword, Google will return about 2.6 million hits, some of which are sites written in Esperanto.
Esperanto accounts for more than 99% of all published material on constructed languages.
As depicted in the poem “Utopia” (article page 20 of Translorial), albeit in black and white, the flag of Esperanto is green with a white area (green 2:3, white 1:1) in the top left corner with a green 5 pointed regular star pointing upwards centered in it. The meaning of this symbol stands for the hope (green) of the five continents united (5-pointed star) in common understanding and peace (white color). And because Dr. Zamenhof was a thorough gentleman, he even wrote the anthem to go with it.