Duolingo Terms of Service

This is Duolingo's Terms of Service — the legal agreement that applies to everyone who uses the Duolingo language-learning app or website. The most important thing to know is that any content you post or submit to Duolingo — including recordings of your voice, profile information, and lesson responses — can be used by Duolingo for any purpose, including commercial use, permanently and worldwide. If you want to opt out of mandatory arbitration (which prevents you from suing Duolingo in court), you must do so in writing within 30 days of first agreeing to these terms.

Duolingo's Terms of Service governs the contractual relationship between Duolingo, Inc. and users of its language-learning platform (web and mobile), establishing binding obligations through continued use or explicit account creation as the legal basis for the agreement. The most significant obligations include users granting Duolingo a broad, royalty-free, sublicensable, perpetual license to all user-submitted content, and Duolingo reserving absolute discretion to suspend or terminate accounts without notice. Notably, the ToS includes a mandatory binding arbitration clause with a class action waiver, a 30-day opt-out window, and a shortened limitation period requiring disputes to be filed within one year — all of which materially restrict users' legal recourse beyond industry-standard terms. The document engages COPPA (given Duolingo's known minor-user base and the Children's platform Duolingo ABC), CCPA/CPRA for California residents, and GDPR for EU/EEA users, with enforcement exposure from the FTC and applicable state attorneys general. Material compliance considerations include the adequacy of consent mechanisms for minors, the breadth of the content license relative to GDPR Article 6 lawful basis requirements, and whether the arbitration opt-out process meets CFPB and FTC standards for fairness in consumer contracts.