Since the seventeenth century, more than seven hundred languages have been constructed. The most popular of those languages is Esperanto.
It was invented by Dr. Ludwik Łazarz Zamenhof; , who lived in the town of Bialystok, Poland. He felt that a common language would help people agree better. When he was still in school, he had already worked out the beginnings of his international language.
In 1887, he published a brochure describing his language, and he used the pen name of Dr. Esperanto (one who hopes). Soon people in various parts of the world became interested in this language, which came to be called "Esperanto".
Today, Esperanto is spoken by about 8 million people throughout the world. Even governments and international organizations recognize it in many ways. For example, you can send an international telegram in Esperanto.
There are many rules of grammar for this language, and here are a few. The definite article is la, and does not change. All nouns end in o, all adjectives in a, all adverbs in e, and all infinitives in i.
Here is the beginning of the lord's prayer in Esperanto: "Patro nia, kiu estas en la cielo, snkta estu via nomo; venu regeco via; esto volo via, kiel en la cielo, tiel ankau sur la tero."