The International Linguistics Olympiad (IOL) is an annual international competition that challenges secondary school students to analyze the grammar, structure, culture, and history of different languages through puzzles and problem-solving challenges. No prior knowledge of linguistics is required.
Deadline
Jan 31, 2027
Cost
Free
Eligibility
Grades 9–12
Format
Competition · In-Person
How to apply
Try past problems
Submit your application
Complete the registration form
From the program’s own page — verified, not invented.
Key dates
Early-bird registration deadline
Feb 28, 2027
Early-bird payment deadline
Mar 15, 2027
Standard registration deadline
May 1, 2027
Competition event
Jul 21, 2027
Competition event
Jul 28, 2027
Don’t miss this deadline.Track International Linguistics Olympiad free — Wingman reminds you and syncs it to your calendar.