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 Konarzewski-junior Ludwik Konarzewski-junior Ludwik Konarzewski – junior (April 20, 1918 in Buzuluk – January 23, 1989 in Cieszyn) was a Polish painter, sculptor and teacher of fine arts who worked in Upper Silesia and Cieszyn Silesia. A square in Rydułtowy is named after him. Konarzewski owed his primary artistic education to his father, Ludwik Konarzewski – senior. He started his studies (in painting) at the Academy of Fine Arts in Kraków in 1938, and finished in 1948, being interrupted by the Second World War. He studied under the direction of (among others) the following colourist painters: Wladyslaw Jarocki, Fryderyk Pautsch, Jerzy