Interlingue
There were already many types of constructed languages during de Wahl's time. Some of them, like Esperanto and Ido, are called schematic because they follow their own design even if the words look more artificial. Others, like Latino sine flexione and Idiom Neutral, are called naturalistic because they try to look like natural languages. The difficulty was that creators had to choose between being regular or looking natural. Louis Couturat, the creator of Ido, wrote the same thing in 1903, and called it a paradox: "The international words are not regular, and the regular words are not international." The language that de Wahl made had a goal to be a language that was both regular and natural at the same time.