NACLO at Princeton

The North American Computational Linguistics Open Competition is a contest in which high-school students solve linguistics puzzles, roughly parallel to the USAMO/USAPhO/USNCO/USACO for math, physics, chemistry, and computer science. In solving the problems, students learn about the diversity and consistency of language, while exercising logic skills. No prior knowledge of linguistics or second languages is necessary. The winners of the Invitational Round are eligible to represent North America at the International Linguistics Olympiad.

The 2021 NACLO will be held primarily online. Please register for the At-Home participation option; if you previously signed up to take the Open Round at Princeton, you will be reassigned to the At-Home participation option and contacted by NACLO with further instructions. Any high school or middle school student is invited to participate in the Open Round. The best performing students on the Open Round will be notified in early March that they have qualified for the Invitational Round.

Princeton will also hold a virtual training session on January 16th, 10 AM, at this Zoom link: For more information, please contact Professor Christiane Fellbaum at or Eve Fleisig at