Occidental language
The language Occidental, later Interlingue, is a planned international auxiliary language created by the Balto-German naval officer and teacher Edgar de Wahl, and published in 1922. The vocabulary is based on already existing words from various languages. The language is thereby naturalistic, at the same time as it is constructed to be regular. Occidental was quite popular in the years before the Second World War, but declined in the years thereafter.
Occidental is devised so that many of its derived word forms reflect the similar forms common to a number of Western European languages, primarily those in the Romance family. This was done through application of de Wahl's rule which is a set of rules for converting verb infinitives into derived nouns and adjectives. The result is a language easy to understand at first sight for individuals acquainted with several Western European languages. Coupled with a simplified grammar, this made Occidental exceptionally popular in Europe during the 15 years before World War II.
