NACLO 2022 - North American Computational Linguistics Open competition
Columbia University, Computer Science Department

Important Dates:

January 27, 2022
10:00 am 1:00 pm
NACLO Open Round (first round), virtually on Zoom

March 17, 2022
9:00 am-1:00 pm
NACLO Invitational Round (second round)

What is NACLO?

NACLO (the North American Computational Linguistics Open competition) is a contest in which high-school students, as well as middle-school students, solve problems relating to linguistics and computational linguistics. No prior knowledge of linguistics or second languages is required. Students may participate at their high school or at a nearby university site. This year, Columbia University will be the local university site for the New York Metropolitan area. The open round of the contest will take place on Thursday, January 27, 2022. Well-performing students will be invited to the second (invitational) round, which is scheduled to take place on March 17, 2022. The top students in the second round will have a chance to participate in the 18th International Linguistics Olympiad, one of thirteen international high school science Olympiads.

More information about NACLO, including a student handbook and practice problems, can be found at the official NACLO website,


How can I register for the Open (first) Round?

Students who are interested can register at the NACLO registration site. The regular registration deadline (recommended) is January 24, 2022, 3:00 pm EST. Participation in the event is free.


Where is the Columbia University location for the Open (first) Round?

The Open Round will take place on Zoom. Due to Covid restrictions we are currently not permitted to hold in-person events on Campus. We will contact registered participants with guidelines for participating remotely, including a Zoom link.


When should I arrive for the Open (first) Round?

The contest begins promptly at 10:00am and runs three hours until 1:00 pm on Thursday, Janury 27, 2022. You will be able to log onto Zoom starting at 9:30am.


Where is the Columbia University site for second (invitational) round?

To be determined. We hope to be able to host the invitational round on Campus.


When should I arrive for the second (invitational) round?

The contest begins promptly at 9:00 AM EST and runs for four hours until 1:00 PM EST on Thursday March 17, 2022. Please arrive early, at about 8:45 AM in order to have the instructions read to you. Students who arrive late are not allowed to have extra time to have instructions/ announcements repeated for them.


What should I study?

Some sample questions for practice are available here.


Who should I contact?

Please ask us any questions you might have. To ensure you receive prompt reply please email all of the following administrative contacts:

  • Dr. Daniel Bauer, <bauer at cs dot columbia dot edu>

webmaster - bauer [at] last updated - 01.17.22