aUI (constructed language)

aUI (constructed pronunciation: [auːiː]) is a philosophical and ideographic a priori language created in the 1950s by W. John Weilgart, Ph.D. (March 9, 1913 – January 26, 1981; born Johann Wolfgang Weixlgärtner, and also known as John W. Weilgart), a philosopher and psychoanalyst originally from Vienna, Austria. He described it as "the Language of Space", connoting universal communication, and published the fourth edition of the textbook in 1979; a philosophic description of each semantic element of the language was published in 1975.

In his psychotherapy work, Weilgart sometimes used client-created aUI formulations to reveal possible subconscious associations to problematic concepts. aUI can also be considered an experiment in applied cognitive lexical semantics, and Weilgart originally envisioned it serving as an international language for "Peace through Understanding".