Interlinguistics of interlinguistics are, however, not so constructive, but rather descriptive, comparative, historic, sociolinguistic, or concerned with translation by humans or machines. As for Esperanto, which is the most widely used constructed interlanguage, there is a relatively abundant literature about the language itself and its philology (see Esperantology). Only a few of the many constructed languages have been applied practically to any noteworthy extent. The most prosperous were Volapük (1879, Johann Martin Schleyer), Esperanto (1887 Ludwik Lejzer Zamenhof), Latino sine flexione (1903, Giuseppe Peano), Ido (1907, Louis Couturat), Occidental-Interlingue (1922, Edgar de Wahl) and Interlingua (1951, IALA and Alexander Gode), with
Ludwik Kowalski Ludwik Kowalski Ludwik Kowalski (born 1931) is a Polish-American physicist, anti-communist author, and professor emeritus of Montclair State University in Montclair, New Jersey. Kowalski was born in Poland. His parents, members of the Polish Communist Party (the precursor of Polish United Workers' Party), decided to emigrate to the Soviet Union in 1932. In Moscow, they continued in their careers as an engineer and nurse. His father was arrested in the night during the Great Purge in 1938 as an "enemy of the people," never to be seen again by his family. Kowalski and his mother lost their home and lived