International Linguistics Olympiad (IOL)
Global olympiad in linguistics and language puzzles; you reach it by performing well in your country's qualifying contest (e.g., NACLO for US/Canada).
The International Linguistics Olympiad (IOL) is an annual international competition
Since its inception in 2003, the IOL has been hosted in a different country each year
The competition challenges participants to analyze the grammar, structure, culture, and history of different languages
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7EDU Global Academy NACLO Site (Bay Area)
Only public Bay Area high‑school NACLO site; good option if your school doesn't host the competition.
BYU NACLO Site
Brigham Young University NACLO competition site; host information and registration for students in Utah and surrounding areas.
North American Computational Linguistics Open Competition (NACLO)
Flagship North American contest where students solve linguistics and computational linguistics puzzles; top scorers can make national teams for IOL.
University of Washington NACLO Site
Local NACLO competition site at University of Washington; provides on-site support for students in the Pacific Northwest region.
NACLO
Pencil-and-paper contest where high school students solve self-contained linguistic puzzles across world languages; top scorers advance toward the International Linguistics Olympiad team.
Online Olympiad in Linguistics (OnLing)
Fully online international linguistics contest with a dedicated school‑age division; problems look like IOL/NACLO style puzzles.