The International Linguistics Olympiad is the world championship of linguistic puzzles — held annually since 2003, with five problems over six hours in the individual round. Each problem is a small piece of an unfamiliar language, and the task is to reverse-engineer enough of the grammar to translate new sentences both ways. No field knowledge required.
Browse below by year. Each card opens a per-problem solve page with rosetta data, gradable inputs, a stopwatch, and reveal-on-give-up answers. Two problems (IOL 2003 P3 · Basque, IOL 2003 P4 · Adyghe) have bespoke pages with hand-written explanations; the rest use a generic data-driven solver.
Year / problem index curated by the
Linguini benchmark
(Meta Research, CC-BY-SA, 2024). The IOL problems themselves are
© their authors, distributed by the International Linguistics
Olympiad for educational use. See ioling.org · Problems by year
for original PDFs (solutions, scoring guides, and the team-contest problems
too).
Years 2020 (cancelled — pandemic) and 2024 – 2025 are
not in the bundled index yet. Drop the source PDFs into
data/linguistics-puzzles/ and we can ingest them next.