Ithkuil is an experimental constructed language created by John Quijada. It is designed to express more profound levels of human cognition briefly yet overtly and clearly, particularly about human categorization. It is a cross between an a priori philosophical and a logical language. It tries to minimize the vagueness and semantic ambiguity in natural human languages. Ithkuil is notable for its grammatical complexity and extensive phoneme inventory, the latter being simplified in an upcoming redesign. The name "Ithkuil" is an anglicized form of Iţkuîl, which in the original form roughly meant "hypothetical representation of a language." Quijada states he did not create Ithkuil to be auxiliary or used in everyday conversations. Instead, he wanted the language for more elaborate and profound fields where more insightful thoughts are expected, such as philosophy, arts, science, and politics.

 

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Since July 2015, Quijada has released several Ithkuil songs in a prog-rock style as part of the album Kaduatán, which translates to "Wayfarers."