NACLO: North American Computational Linguistics Olympiad

Thank you for your interest in the North American Computational Linguistics Olympiad (NACLO).



* The NACLO web site is moving to

* The new site includes a new registration system, a large archive of
practice problems (including automated grading for some of them), a
new handbook, a list of resources for site hosts and students,
etc. Please check it out [here].

* Registration for 2015 is now open on the new site. Please email if you have problems registering.


Please donate to NACLO here.   This link brings you to a donation page at Carnegie Mellon University, which is connected to the NACLO account. On page 2 the preferred designation "Naclo Olympiad" should fill-in automatically. We thank you for your support!

We're looking for new sites and problem contributors . Please send all questions to .


This olympiad is a contest in which high-school students solve linguistic puzzles. 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. Professionals in linguistics, computational linguistics and language technologies use dozens of languages to create engaging problems that represent cutting edge issues in their fields. The competition has attracted top students to study and work in those same fields. It is truly an opportunity for young people to experience a taste of natural-language processing in the 21st century.

Questions about the site? Email gm [at] pangeon [dot] com