International Linguistics Olympiad (IOL)

The International Linguistics Olympiad (IOL) is an annual international competition for secondary-school students focused on solving challenging, self-contained problems in linguistics. Problems may involve phonology, morphology, syntax, semantics, historical linguistics, sociolinguistics, computational linguistics and other areas. No prior knowledge of linguistics or extensive knowledge of foreign languages is required; logical reasoning, pattern recognition, careful analysis and creative problem-solving are central to the competition. Students qualify through their national Linguistics Olympiad. At the international stage, national teams compete in individual and team competitions. In 2026, 255 contestants from 65 teams representing 46 countries and territories competed in Bucharest.

Strong development of logical and analytical reasoning. Pattern recognition in unfamiliar linguistic data. Non-routine problem-solving skills. Linguistic reasoning. No prior linguistics knowledge required. Attention to detail and information processing. Argumentation and written explanation. International academic competition. Opportunity to qualify for a national team. Strong achievement for an academic portfolio. Particularly relevant to Linguistics, Computer Science, AI/NLP, Mathematics, Cognitive Science, Psychology, Languages and Philosophy.

Contestants must be secondary-school or lower-grade students. Contestants must be under 20 on the opening day of the IOL. There is no lower age limit as long as the student meets the school-status requirement. Current university students are not eligible. No prior linguistics knowledge is required. Knowledge of multiple foreign languages is not required. Students cannot register directly for the IOL. They must qualify through their national Linguistics Olympiad. National competitions are organized independently and have their own application deadlines and requirements. Recommendation letters, motivation essays and standard interviews are not normal components of the international IOL application. Selection is primarily based on performance in the national Olympiad.