Loglan

Etymology
Short for logical language.

Proper noun

 * 1) Any of several related artificial languages, designed to be logical, the first of which was developed by James Cooke Brown in the mid-20th century.
 * 2) The original language developed by James Cooke Brown, as maintained by The Loglan Institute.
 * The Loglan formal grammar is made up of 91 CFG-type rules.