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
Mark Zamenhof of Zamenhof would be bound with the dismissal of many Polishes, that happened after 1863. Then Russian authorities sacked many Polish teachers. One reckons that in 1873 the Zamenhof family abandoned Bialystok. Even so unanswered is the question about the real cause of the transfer of Zamenhofs in Warsaw, where Mark surely advanced as a teacher of the German language in the Veterinary Institute and in the actual school, being that time only one from between three (!) Hebrews, that deserved to instruct in the Warsaw state schools . Because of what the local teacher received like this important position?