Edgar de Wahl
De Wahl was first introduced to interlinguistics through Volapük, which his father's colleague Waldemar Rosenberger introduced him to. He composed a lexicon of marine terminology for the language before turning to Esperanto in 1888. He supported Esperanto and influenced the early work on its grammar and vocabulary along with the ophthalmologist L.L. Zamenhof. After the failure of Reformed Esperanto, which he supported, he started creating his ideal form of an international language. In 1922, de Wahl published a "key" to a new language, Occidental, and the first edition of the periodical Kosmoglott (later Cosmoglotta). He developed the language over several decades with input from its speakers but became estranged from the movement centered in Switzerland from 1939 after the start of World War II. Later, he joined the Committee of Linguistic Advisors, part of the International Auxiliary Language Association, which presented Interlingua in 1951.