In 1903 Peano announced his work on an international auxiliary language called Latino sine flexione ("Latin without inflexion," later called Interlingua, and the precursor of the Interlingua of the IALA).
Aastal 1903 avalikustas Peano, et ta ehitab rahvusvahelist abikeelt Latino sine flexione ("Ladina keel ilma kääneteta", hiljem kutsutud ka kui Interlingua, olles IALA Interlingua eelkäija).