Comparison between Esperanto and Ido Ido was satisfied with it. Many former Idists, such as Otto Jespersen (who created Novial) left the movement, bleeding Ido of leaders. Of all synthetic auxiliary languages, only Esperanto and Interlingua-IL de ApI gained a sizeable following and textual corpus to this day. Esperanto is based on the "Fundamento de Esperanto" by L. L. Zamenhof; whereas the grammar of Ido is explained in the "Kompleta Gramatiko Detaloza di la Linguo Internaciona Ido". Since Esperanto has proved to be a living, stable language, nowadays Esperantists are less quick to reject influences from Ido. Probably the most fundamental of these is that
Ludwik Hass Ludwik Hass Ludwik Hass (1918–2008) was a Polish historian who specialised in the history of Freemasonry in Poland. Hass was born to Jewish parents in Stanisławow. He was brought up in a middle-class family which had been assimilated to polish nationalism. He attended the University of Lvov, which was then in the territory of the Polish Second Republic. While there he became a Trotskyist. Following the German-Soviet invasion of Poland in 1939 he found himself in the territory of the Soviet Union. He was arrested and sent to Vorkutlag. He attributed his survival due to being assigned office work thanks