Either a completely freely (‘a priori’) invented language or (as in most attempts) a language derived from natural languages (‘a posteriori’) through simplification which is used for international communication. In the...

Interlingua is an international auxiliary language (IAL) published in 1951 by the International Auxiliary Language Association (IALA). It is the most widely used naturalistic auxiliary language.[1] Interlingua was developed to combine a simple, regular...