You may also have the right to make a GDPR complaint to the relevant Supervisory Authority. Here is a list of EEA Supervisory Authorities , and a link to the UK Supervisory Authority .

Data Retention

To ensure your account stays operational, Duolingo will generally retain your personal information until your account is deleted. However, Duolingo may retain certain information longer if necessary to provide our Service, defend our legitimate interests or those of third parties, comply with legal requirements, resolve or defend ourselves in disputes, investigate misuse or disruption of the Service, or perform agreements. We may also retain anonymous data indefinitely.

Lessons are made age-appropriate by removing mature words. Advertisements are non-personalized and set to family-safe content. Third-party behavioral tracking is disabled. Third-party analytics are disabled. Promotional emails are disabled. Child Users' speech data is not shared with Duolingo for product improvement purposes. Child Users cannot submit their real name or any pictures to their Profile, but are represented only by a letter avatar or cartoon avatar they can create from preset options. The Contact Sync feature is disabled for Child Users. Child Users may follow and be followed by other users. Child Users can search for other users, or be searched for by other users, but only by providing an exact username or a referral link. Duolingo may suggest following other Child Users who already follow the Child User or have mutual followers with them, but non-Child Users will not be suggested to Child Users, and Child Users will not be suggested to non-Child Users. Child Users' Profiles are visible from the profiles of users they follow or who follow them. Child Users can only send or receive canned comments to or from Friends; they cannot send or receive user-written comments. Child Users can like and celebrate other users' achievements. Interactive features between users, such as nudges, challenges, and quests, are only enabled for Child Users with their followers and users they follow. Friends, followers, and other users can be blocked, reported, or unfollowed. Social features can be disabled within the app Settings. The Child User's username will be replaced with a random fake name to all other users in the leaderboard. For example, the Child User could appear as "John Smith" instead of their real username to other users. Other leaderboard users cannot view the Child User's Profile or follow the Child User from leaderboards. Child Users will only see avatars of other users instead of profile pictures in their leaderboard. Child Users will see sanitized names on their leaderboard; names that have profane or obscene words will be replaced with a fake name for Child Users. The leaderboards feature can be disabled within the app Settings. Advertisements are set to non-personalised. Third-party behavioral tracking is disabled. Third-party analytics are disabled.

Child Users

We know that children deserve extra privacy protection, and each country has different rules on how children should be treated depending on their age. That's why children who use Duolingo get a slightly different experience when using the app. Duolingo treats Child Users (meaning users under the age of 13 in the United States or another age of digital consent in their country) differently to ensure their parents are in control and we only collect the bare minimum information we need to make Duolingo work.

a. Registration