Interlingua (disambiguation)

• Interlingua, an auxiliary language developed by the International Auxiliary Language Association.
• Latino Sine Flexione, a largely defunct auxiliary language developed by Giuseppe Peano.
• A general term describing any international auxiliary language. See also interlinguistics.
• A language-neutral representation of semantic and grammatical concepts; see Interlingual machine translation.
• A name given to the fictional "basic speech" used in science fiction settings, such as Star Trek and the works of Robert A. Heinlein.

You may also be looking for Interlingue, more commonly known as Occidental, a little-used auxiliary language originally devised by Edgar de Wahl.