Loglan

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Loglan
La Logla
Cartoon translation: "Professor Brown, someone is here, and has informed me that he wishes to test the Whorf hypothesis."
Created by	James Cooke Brown
Date	1955
Setting and usage	engineered language for testing the Sapir–Whorf hypothesis and other linguistic research
Purpose	Constructed language engineered language logical language Loglan
Sources	eight of the most common languages: English, Chinese (Beijing dialect), Hindi, Russian, Spanish, French, Japanese, German
Language codes
ISO 639-3	–
Glottolog	None
IETF	art-x-loglan

Loglan is a logical constructed language originally designed for linguistic research, particularly for investigating the Sapir–Whorf hypothesis. The language was developed beginning in 1955 by Dr. James Cooke Brown with the goal of making a language so different from natural languages that people learning it would think in a different way if the hypothesis were true. In 1960, Scientific American published an article introducing the language.^[1] Loglan is the first among, and the main inspiration for, the languages known as logical languages, which also includes Lojban.

Brown founded The Loglan Institute (TLI) to develop the language and other applications of it. He always considered the language an incomplete research project, and although he released many publications about its design, he continued to claim legal restrictions on its use. Because of this, a group of his followers later formed the Logical Language Group to create the language Lojban along the same principles, but with the intention to make it freely available and encourage its use as a real language.

Supporters of Lojban use the term Loglan as a generic term to refer to both their own language and Brown's Loglan, referred to as "TLI Loglan" when in need of disambiguation. Although the non-trademarkability of the term Loglan was eventually upheld by the United States Patent and Trademark Office, many supporters and members of The Loglan Institute find this usage offensive and reserve Loglan for the TLI version of the language.