Volapük

Volapük (; , 'Language of the World', or ) is a constructed language created in 1879 and 1880 by Johann Martin Schleyer, a Roman Catholic priest in Baden, Germany. Notable as the first major constructed international auxiliary language, it primarily drew from Germanic languages. Its grammar is inspired largely by German, although it was heavily regularized by Schleyer, while its lexicon is rooted mostly in English, with additional influence from German, the Romance languages, and Russian. Despite some roots remaining recognizable, many words were altered beyond recognition, as Schleyer sought to make most of the vocabulary monosyllabic.

Volapük conventions took place in 1884 (Friedrichshafen), 1887 (Munich) and 1889 (Paris). The first two conventions used German, and the last conference used only Volapük. By 1889, there were an estimated 283 clubs, 25 periodicals in or about Volapük, and 316 textbooks in 25 languages; at that time the language claimed nearly a million adherents. Volapük experienced a small revival in the 1930s due to Arie de Jong's reforms of the language, which became called Volapük nulik. This form simplified the language and became the commonly accepted form of it. Volapük was largely displaced between the late 19th and early 20th century by Esperanto, as many Volapükists switched to Esperanto due to the internal conflicts within the Volapükist movement.