Comparison between Interlingue and Interlingua
Interlingue and Interlingua are constructed international auxiliary languages. == Nomenclature == Interlingu- applies to three international auxiliary languages: Interlingua de Peano, published by the Italian mathematician Giuseppe Peano in 1903 and known most commonly as Latino sine flexione (Latin without inflections).
Source: Wikipedia — Comparison between Interlingue and Interlingua (CC BY-SA 4.0)