Country	Code	Local Competition	Abbr.	Contact	†
	Australia	AUS	Australian Computational and Linguistics Olympiad	OzCLO	✉️	✅
	Brazil	BRA	Olimpíada Brasileira de Linguística	OBL	✉️	✅
	Bulgaria	BGR	Олимпиада по математическа лингвистика		✉️	✅
	Canada Anglophone	CEN	North American Computational Linguistics Olympiad	NACLO	✉️	✅
	Canada Francophone	CFR	Olympiade linguistique canadienne francophone	OLCF	✉️	✅
	China	CHN	全国语言学奥林匹克竞赛		✉️	✅
	Colombia	COL	Olimpiada Colombiana de Lingüística	OCL	✉️	✅
	Czechia	CZE	Česká lingvistická olympiáda		✉️	✅
	Estonia	EST	Lingvistikaolümpiaad		✉️	✅
	Finland	FIN	Suomen kielitieteen olympialaiset	KiOl	✉️	✅
	Germany	DEU	Deutsche Linguistik-Olympiade	DOL	✉️	✅
	Greece	GRC	Πανελλήνια Μαθητική Ολυμπιάδα Γλωσσολογίας		✉️	✅
	Hong Kong	HKG	Hong Kong Linguistics Olympiad	HKLO	✉️	✅
	Hungary	HUN	Magyar Nyelvészeti Diákolimpia		✉️	✅
	India	IND	Panini Linguistics Olympiad	PLO	✉️	✅
	Iran	IRN	المپیاد زبان و ادبیات فارسی		✉️	✅
	Ireland	IRL	All Ireland Linguistics Olympiad	AILO	✉️	✅
	Isle of Man	IMN	Lingomann		✉️	✅
	Israel	ISR	האולימפיאדה הישראלית בבלשנות		✉️	✅
	Japan	JPN	日本言語学オリンピック	JOL	✉️	✅
	Kazakhstan	KAZ	Республикалық олимпиада	KazLO	✉️	✅
	Latvia	LVA	Latvijas Lingvistikas Olimpiādes		✉️	✅
	Macau	MAC	澳門奧林匹克語言學	MOL	✉️	✅
	Malaysia	MYS	Olimpiad Linguistik Komputational Malaysia	MyCLO	✉️	✅
	Malta	MLT	Linguistics Olympiad Malta	LOM	✉️	✅
	Moldova	MDA	Olimpiada de Lingvistică în Republica Moldova	OLRM	✉️	✅
	Nepal	NPL	Himalayan Linguistic Olympiad Nepal	HLON	✉️	✅
	Netherlands	NLD	Taalkunde Olympiade	TKO	✉️	✅
	Philippines	PHL	Philippine Linguistics Olympiad	PhLO	✉️	✅
	Poland	POL	Olimpiada Lingwistyki Matematycznej		✉️	✅
	Republic of Korea	KOR	한국언어학올림피아드	KLO	✉️	✅
	Romania	ROU	Olimpiada Națională de Lingvistică		✉️	✅
	Russia	RUS	Московская традиционная олимпиада по лингвистике		✉️	✅
	Singapore	SGP	Singapore Linguistics Olympiad	SLO	✉️	✅
	Slovenia	SVN	Tekmovanje iz logike		✉️	✅
	Spain	ESP	Olimpiada Lingüística	OLE	✉️	✅
	Sweden	SWE	Lingolympiad		✉️	✅
	Switzerland	CHE	Linguistik-Olympiade/Olympiades de Linguistique/Olimpiadi della Linguistica		✉️	✅
	Taiwan	TWN	語言學奧林匹亞競賽臺灣隊	TOL	✉️	✅
	Thailand	THA	ภาษาศาสตร์โอลิมปิกแห่งประเทศไทย	LOT	✉️	✅
	Ukraine	UKR	Київська відкрита олімпіада з лінгвістики		✉️	✅
	United Kingdom	GBR	UK Linguistics Olympiad	UKLO	✉️	✅
	United States of America	USA	North American Computational Linguistics Open Competition	NACLO	✉️	✅

† Accreditation Status: ✅ = Accredited; ❌ = Not Accredited; ⏳ = Application in Progress. Last updated 1 Feb 2025.

Note: Under exceptional circumstances, two or more entities (“territories”) from the same country may apply to the International Board to be permitted to send separate teams to the IOL. Please refer to Section 2.4 Definitions of Countries of the Regulations of the International Linguistics Olympiad for further details.

Previous Participants

	Country	Code	Status
	Azerbaijan	AZE	Last participated in 2022
	Bangladesh	BGD	Last participated in 2019
	Canada	CAN	Last participated in 2016
	Denmark	DNK	Last participated in 2019
	France	FRA	Last participated in 2021
	Lithuania	LTU	Last participated in 2006
	Norway	NOR	Last participated in 2021
	Pakistan	PAK	Last participated in 2016
	Serbia	SRB	Last participated in 2013
	Sri Lanka	LKA	Last participated in 2016
	Türkiye	TUR	Last participated in 2023
	United Arab Emirates	ARE	Last participated in 2022
	Uzbekistan	UZB	Last participated in 2019
	Vietnam	VNM	Last participated in 2021