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PRIVACY POLICY

Please note that the Privacy Policy was last revised on March 4, 2024


 1.  GENERAL
     
     At Duolingo, we care about your personal information, so we have prepared
     this Privacy Policy to explain how we collect, use, and share it. This
     Privacy Policy applies to Duolingo websites, mobile apps, and related
     services (“Service”). By using the Service, you agree with Duolingo’s
     collection, use, and sharing of your personal information in accordance
     with the terms of this Privacy Policy.
     
     Certain Duolingo services are subject to additional or different terms. For
     example, when you register for or take the Duolingo English Test, you are
     also subject to the Supplemental Privacy Terms for the Duolingo English
     Test.
     
     Please note that Duolingo is constantly testing and improving our product
     features. Any features discussed in this Privacy Policy may not be
     available to all users or in all jurisdictions.


 2.  INFORMATION WE COLLECT
     
     When you use the Service, Duolingo may collect the following personal
     information about you.
     
     A. ACCOUNT REGISTRATION
     
     To register for a Duolingo account, you may provide us with your age and
     email address. In some countries, you may also provide us with your phone
     number.
     
     You may also register for a Duolingo account using certain social logins,
     such as Google and Facebook. If you register for Duolingo using a social
     login, Duolingo may receive information about you from your social login
     provider, including your email address and contacts.
     
     You can manage your Duolingo account and social logins from your Settings.
     
     B. PROFILE PAGE & USER-GENERATED CONTENT
     
     After you register for your Duolingo account, a profile page will be
     created for you (“Profile”). Your Profile will be populated by information
     you submit, such as your name, username, bio, and profile picture
     (“User-Generated Content”). Your age, phone number, and email address are
     not included in your public Profile and are not considered User-Generated
     Content under this Privacy Policy. Other Duolingo users may be able to
     search for your Profile using your name, username, email address, or phone
     number.
     
     Your Profile will also include information about your learning progress,
     such as the languages you are learning, your learning statistics, and your
     achievements. Moreover, your Profile will show a list of your followers and
     other users you follow.
     
     By default, your Profile is public, and visible to other Duolingo users and
     anyone else on the Internet. In addition, your User-Generated Content may
     be publicly visible. If your Profile is public, third-party websites or web
     scrapers may be able to read, collect, and use your public information for
     their own purposes. However, you can set your Profile to private in your
     Settings.
     
     You may be able to submit comments that will supplement other users’
     Profiles and other users may be able to submit comments that will
     supplement your Profile. Any comments you submit are considered
     User-Generated Content under this Privacy Policy. You can delete comments
     you submit or comments that other users submit to your Profile.
     
     Duolingo may scan or review any User-Generated Content, or share your
     User-Generated Content with a third-party content moderation service
     provider, to ensure compliance with our Community Guidelines. Duolingo may
     restrict or delete User-Generated Content if it violates our Community
     Guidelines or for any other reason.
     
     C. DUOLINGO MAX
     
     If you subscribe to Duolingo Max, you may interact with Artificial
     Intelligence (“AI”) features, including Explain My Answer, which provides
     you with AI-powered feedback on your answers, and Roleplay, which allows
     you to send text or audio messages to an AI chat companion in an open-ended
     conversational format.
     
     When you interact with AI features, your information may be shared with AI
     vendors such as OpenAI, which may keep a copy of your text or audio
     responses for their own purposes. Please do not submit any personal or
     confidential information when using AI features.
     
     D. SPEAKING CHALLENGES
     
     Some lessons involve you speaking into the Duolingo app. To recognize
     speech, your audio may be sent to a third-party provider such as Google,
     Apple, or Amazon Web Services. You may disable speaking challenges in your
     Settings or skip speaking challenges in your lesson.
     
     Duolingo may also collect and analyze your speech to help us understand the
     effectiveness of our lessons and to improve the product. You may choose not
     to share your audio with us for product improvement purposes in your
     Settings. Any audio you agree to send to Duolingo is anonymized when it
     reaches our servers to ensure that no trace of your personal information
     remains attached to the audio.
     
     E. CONTACT SYNC FEATURE
     
     Duolingo has a Contact Sync feature, which allows you to find your contacts
     who also use Duolingo. If you use Contact Sync, you will give the Duolingo
     app permission to access the contacts stored on your phone for the purpose
     of identifying your contacts who also use Duolingo. If Duolingo identifies
     a user with the same phone number as someone in your contacts, we will
     recommend that user as someone you may wish to follow.
     
     If you use the Contact Sync feature, Duolingo will not store your contacts’
     phone numbers, but only an encrypted “hash” of them. This hash is an
     alternative code to the actual phone number and can be used only to
     uniquely identify the number. The hashing process securely strips away the
     real phone number, so Duolingo cannot use the hashes to identify your
     contacts’ real phone number, contact your contacts, or share their
     information with anyone else. This hashing process applies only to your
     contacts’ phone numbers and not yours.
     
     If you have submitted your phone number to Duolingo, whether through
     Contact Sync or some other way (such as adding the phone number to your
     profile, using it to register, or using it to activate other product
     features), other Duolingo users who have your phone number in their
     contacts may be able to locate your Profile using Contact Sync.
     
     F. ACTIVITY DATA
     
     When you use the Service, we may generate data about your use of the
     Service, which may include your browser and device data, log data, and IP
     address. We will also generate data regarding your engagement in
     educational activities on the Service.
     
     G. FULLSTORY
     
     When you use Duolingo in our app or on our website, some of your activity
     will be logged by a service called FullStory. FullStory captures and
     analyzes your activity and provides us with data and a video session replay
     of your activity to help us make the Duolingo experience better. FullStory
     does not record usernames, names, profile images, email addresses, profile
     locations or bios, or passwords. However, FullStory records usage patterns
     (e.g., clicks, mouse movements, scrolling, and typing), tech specs (e.g.,
     browser, device type, operating system, viewfinder size, script errors, and
     IP address), navigation (e.g., pages visited, referrers, URL parameters,
     and session duration), and learning activity (e.g., session progress and
     answers). You can disable FullStory activity recording by using the opt-out
     function on FullStory’s website. FullStory is disabled for known Child
     Users.
     
     H. COOKIES
     
     When you access the Duolingo website, we store certain data from your
     browser using cookies. A cookie is a piece of data stored on the user’s
     computer tied to data about the user. We use session ID cookies to confirm
     that users are logged in. If you do not want your data to be collected by
     cookies, there is a simple procedure in most browsers that allows you to
     deny or accept the cookie feature. However, cookies may be necessary to
     provide you with certain features available on the website (e.g.,
     customized information). You can find more information about cookies and
     how to manage them here.
     
     You can see a list of all cookies used at Duolingo on our Cookie List page
     and manage your cookies in the Privacy Preference Center. Please note that
     our cookies include Targeting Cookies from Google, Facebook, Amazon, and
     other companies, which these companies may use to track your activities
     across multiple websites to deliver personalized advertising to you.
     
     I. GOOGLE ANALYTICS
     
     We use Google Analytics, which is a web analytics tool that helps us
     understand how users engage with our website. Like many services, Google
     Analytics uses first-party cookies to track user interactions, as in our
     case, where they are used to collect information about how users use our
     site. This information is used to compile reports and to help us improve
     our site. These reports disclose website trends without identifying
     individual visitors. You can opt out of Google Analytics by installing
     Google’s browser add-on available here.


 3.  HOW WE PROCESS YOUR INFORMATION
     
     Duolingo may process your personal information according to the following
     legal bases: to provide products or services you request, to promote
     Duolingo’s legitimate interests, to comply with legal obligations, and with
     your consent. In particular, Duolingo may process and share your personal
     information in the following ways:
     
     A. PROVIDING AND IMPROVING THE SERVICE
     
     Duolingo will process your personal information to provide and improve the
     Service. For example, we will use the information you provide to maintain
     your Profile and learning progress, display your Profile to other users
     (unless you make it private), personalize learning content, detect and fix
     bugs, perform research, and provide customer service to you.
     
     Duolingo may share personal information with third parties that help us
     provide or improve the Service, including hosting providers such as Amazon
     Web Services, search engine providers such as Google, analytics providers
     such as Crashlytics, support providers such as ZenDesk, and payment
     processors such as Stripe. Duolingo may also share your information with
     third-party vendors that support product features such as AI, speech
     recognition, and content moderation.
     
     If you redeem a promotion code to gain a Duolingo subscription, we may
     share data regarding your usage of Duolingo with the organization that
     provided the promotion code to you.
     
     B. COMMUNICATING WITH YOU
     
     Duolingo will use the email address or phone number you provide to send you
     the following types of messages:
     
     * Essential messages to support the operation of the Service.
     * Messages to support the Duolingo teaching methodology and reinforce your
       learning, such as learning tips, reminders to practice, and progress
       reports.
     * Notifications about friend requests and your friends’ progress on
       Duolingo.
     * Announcements regarding changes to the Service or products.
     * Announcements of new Duolingo products, services, offers, or research
       opportunities.
     
     You may opt-out of receiving non-essential messages in your Settings.
     
     C. COMPLYING WITH LAW AND PREVENTING HARMFUL ACTIVITIES
     
     Duolingo may process and share personal information if necessary to comply
     with legal requests, such as subpoenas or court orders. Duolingo may share
     personal information when we believe it is necessary to comply with law, to
     protect our interests or property, to prevent fraud or other illegal
     activity, to assist law enforcement, or to prevent imminent harm. This may
     include sharing information with other companies, lawyers, agents, or
     government agencies.
     
     D. PERSONALIZED ADVERTISING
     
     Duolingo may process and share your personal information for the purpose of
     providing you with personalized advertising. To provide personalized
     advertising, we work with a variety of third-party advertising networks,
     marketing analytics service providers, and website analysis firms, such as
     Google, Facebook, Oath, and Unity. These third-party advertising service
     providers collect and use personal information about your visits to and use
     of the Service, as well as other websites, in order to serve you with
     advertisements and content tailored to meet your preferences and likely
     interests, and better understand ad effectiveness. Aggregate demographic
     and interest data will also be used for market research purposes.
     
     You can opt out of receiving personalized advertising in your Settings. You
     may also be able to opt out of receiving personalized ads from advertisers
     and ad networks that are members of the Network Advertising Initiative or
     who follow the DAA Self-Regulatory Principles for Online Behavioral
     Advertising using their respective opt-out tools hyperlinked above. In
     addition, your mobile devices may offer settings that let you make choices
     about the collection, use, and transfer of mobile app information for
     personalized ads (for example, Apple iOS’ Advertising ID and Google
     Android’s Advertising ID). Users in certain jurisdictions (including the
     European Union and United Kingdom) are opted out of personalized
     advertising by default, but may opt in.
     
     Please note that opting out of personalized advertising does not prevent
     the display of all advertisements to you. Certain Duolingo subscriptions
     may offer an ad-free experience.
     
     E. ANONYMOUS INFORMATION
     
     Duolingo may process aggregated, de-identified, or otherwise anonymous or
     anonymized information for any purpose. Such information is not considered
     personal information.


 4.  YOUR DATA SUBJECT RIGHTS
     
     You also have the following rights in relation to the personal information
     we hold about you, in addition to any other rights required by applicable
     law:
     
     * Know what personal information we have collected about you.
     * Access a copy of the personal information that we hold about you.
     * Know what personal information about you we have shared with third
       parties.
     * Opt out of the sharing of your personal information with third parties.
     * Object to our processing of your personal information.
     * Request that we limit our use of your sensitive personal information to
       what is necessary to perform the services you requested.
     * Not be discriminated against for exercising your data subject rights.
     * Request that we delete any personal information we have collected from
       you.
     * Request that we correct any inaccurate personal information about you.
     * Export the personal information you have provided to Duolingo in a format
       that can be transferred electronically to a third party.
     * Withdraw any consent you previously gave us to process your personal
       information.
     * Delete your Duolingo account by following the instructions in the
       Service.
     
     You may update or correct your information, and exercise certain opt-out
     rights, in your Settings page. You may request to access or erase your
     personal information at the Duolingo Data Vault. To make another
     privacy-related request, please send an email to privacy@duolingo.com.
     
     Please note that these rights are not absolute and Duolingo may refuse
     requests to exercise data subject rights if there is a legitimate reason,
     such as if we cannot authenticate your identity, if the request could
     violate the rights of a third party or applicable law, or if the request
     could interfere with a Duolingo service or prevent us from delivering a
     service you requested.
     
     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.


 5.  DATA RETENTION
     
     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.


 6.  CHILD USERS
     
     We know that children deserve extra privacy protection. That’s why we treat
     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.
     
     Child Users are permitted to create a Duolingo account, but we ask them to
     provide their parent’s email address instead of their own, and to register
     using a username that is not tied to their real name.
     
     After a Child User registers, we will send an email to the parent’s email
     address about Duolingo’s privacy practices regarding Child Users, including
     what personal information we collect and how we use, share, and protect
     that personal information. The email also explains how parents can request
     to access, change, or delete information about their child.
     
     All Child Users receive the following special treatment when using Duolingo
     (“Age Restrictions”):
     
     * Lessons are made age-appropriate by removing mature words.
     * Advertisements are non-personalized and set to family-safe content.
     * 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.
     * Promotional emails are disabled.
     * Child Users’ speech data is not shared with Duolingo for product
       improvement purposes.
     
     Child Users in certain jurisdictions (including the United States, European
     Union, United Kingdom, Norway, Canada, Australia, New Zealand, Singapore,
     South Korea, and Japan) are subject to these additional Age Restrictions:
     
     * Child Users may not submit User-Generated Content to Duolingo.
     * Child Users may not provide Duolingo with their real name, profile
       picture, location, contact information, or other personal information.
     * Child Users cannot link their Duolingo account to their contact
       information or to their accounts on other online services.
     * Child Users’ Profiles contain no personal information that could be used
       to publicly identify or contact the child, but only the Child User’s
       username, an avatar created from preset options, list of friends on
       Duolingo, and information about their learning progress on Duolingo.
     
     Child Users may join paid Duolingo Family Plans. If a Child User joins a
     paid Duolingo Family Plan, their profile will be visible to other members
     of the same Duolingo Family Plan.
     
     We have activated limited social features for some Child Users. Child Users
     with these features active can only participate in social features on a
     limited basis as follows:
     
     * Child Users can only search for other users, or be searched for by other
       users, using an exact username or a referral link.
     * Your Child User may see other Child Users in friends suggestions, but
       only if the other Child User follows your Child User or has mutual
       followers with your Child User. Child Users will not see or be seen by
       non-Child Users in friends suggestions.
     * Child Users’ Profiles will be visible from their friends’ profiles.
     * Child Users can only send or receive canned “Kudos” to or from mutual
       followers; they cannot cannot send or receive user-written messages.
     * Child Users can participate in the “Friends Quest” feature with mutual
       followers.
     * You can block or unfollow other users on your Child User’s behalf.
     * You can disable social features for your Child User under Settings at any
       time.
     
     Child Users will have access to leaderboards but will receive the following
     special treatment:
     
     * The Child User’s username will be anonymized 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 will not be able to view the Child User’s Profile
       or follow the Child User from leaderboards.
     * Child Users will only see avatars instead of profile pictures in their
       leaderboard.
     * Child Users will see sanitized usernames on their leaderboard; usernames
       that have profane or obscene words will be replaced with a fake username
       for Child Users.
     * You can disable Leaderboards for your Child User under Settings in your
       child’s Profile at any time.
     
     Parents may remove their child’s Age Restrictions. Additionally, parents
     can report any abuse to us at abuse@duolingo.com.
     
     In addition, all users under the age of 16 receive the following special
     treatment:
     
     * Advertisements are set to non-personalised.
     * Third-party behavioral tracking is disabled.
     * Third-party analytics are disabled.
     
     With regards to the Children’s Online Privacy Protection Act, Duolingo
     collects personal information from children under the age of 13 for the
     sole purpose of performing internal operations of the Service. If we
     discover that we have unknowingly collected additional personal information
     from these children, we will delete it. If you believe this to be the case,
     please contact us at privacy@duolingo.com.


 7.  DUOLINGO ABC
     
     Duolingo ABC is designed to be set up by parents and will ask you to
     provide your child’s age. This information is kept anonymously for research
     purposes and not tied to your or your child’s personal information in any
     way. Duolingo ABC does not collect any personal information from children.
     
     You can choose whether to enable speaking exercises for your child on
     Duolingo ABC. Duolingo ABC speech data is stored on your phone and uses
     Apple’s speech recognition service to convert voice into text. No speech
     data is shared with Duolingo.
     
     As a parent, you also have the option of providing your email address so
     that Duolingo may send you information about product updates and ask you
     about participating in product research. If you do provide your email
     address, you can unsubscribe any time by emailing
     literacy-feedback@duolingo.com or by clicking the unsubscribe link in any
     Duolingo ABC emails. Your Duolingo ABC data is backed up into Apple’s
     iCloud, which allows you to synchronize and restore the data onto another
     Apple device.


 8.  DO NOT TRACK
     
     The Service is not designed to respond to “do not track” signals sent by
     some browsers.


 9.  LINKS TO THIRD-PARTY WEBSITES
     
     The Service may contain links to other websites. Duolingo is not
     responsible for the content or privacy practices of other websites,
     including any personal or financial information collected by third-party
     payment processors. We encourage users to be aware of the privacy policies
     of other websites they visit. This Privacy Policy applies only to
     information collected by Duolingo. Any time you click on a link (including
     advertising banners) or submit your personal information to a third-party
     website, you will be subject to that third party’s privacy policies.


 10. PRIVACY POLICY UPDATES
     
     We may update our Privacy Policy to reflect changes to our information
     practices. If we do this and the changes are material, we will post a
     notice that we have made changes to this Privacy Policy on the Website for
     at least seven (7) days before the changes are made, and we will indicate
     the date these terms were last revised at the bottom of the Privacy Policy.
     Any revisions to this Privacy Policy will become effective at the end of
     that seven (7) day period.


 11. DATA TRANSFER
     
     Duolingo is based in the United States and processes data in the United
     States, which may not provide equivalent levels of data protection as your
     home jurisdiction. Duolingo may transfer the data of users outside the
     United States to the United States.
     
     DATA PRIVACY FRAMEWORK (DPF)
     
     Duolingo complies with the EU-U.S. Data Privacy Framework (EU-U.S. DPF),
     the UK Extension to the EU-U.S. DPF, and the Swiss-U.S. Data Privacy
     Framework (Swiss-U.S. DPF) as set forth by the U.S. Department of Commerce.
     Duolingo has certified to the U.S. Department of Commerce that it adheres
     to the EU-U.S. Data Privacy Framework Principles (EU-U.S. DPF Principles)
     with regard to the processing of personal data received from the European
     Union in reliance on the EU-U.S. DPF and from the United Kingdom (and
     Gibraltar) in reliance on the UK Extension to the EU-U.S. DPF. Duolingo has
     certified to the U.S. Department of Commerce that it adheres to the
     Swiss-U.S. Data Privacy Framework Principles (Swiss-U.S. DPF Principles)
     with regard to the processing of personal data received from Switzerland in
     reliance on the Swiss-U.S. DPF. If there is any conflict between the terms
     in this privacy policy and the EU-U.S. DPF Principles and/or the Swiss-U.S.
     DPF Principles, the Principles shall govern. To learn more about the Data
     Privacy Framework (DPF) program, and to view our certification, please
     visit https://www.dataprivacyframework.gov/.
     
     In compliance with the EU-U.S. DPF and the UK Extension to the EU-U.S. DPF
     and the Swiss-U.S. DPF, Duolingo commits to resolve DPF Principles-related
     complaints about our collection and use of your personal information. EU
     and UK and Swiss individuals with inquiries or complaints regarding our
     handling of personal data received in reliance on the EU-U.S. DPF and the
     UK Extension to the EU-U.S. DPF and the Swiss-U.S. DPF should first contact
     Duolingo at: privacy@duolingo.com.
     
     In compliance with the EU-U.S. DPF and the UK Extension to the EU-U.S. DPF
     and the Swiss-U.S. DPF, Duolingo commits to cooperate and comply
     respectively with the advice of the panel established by the EU data
     protection authorities (DPAs) and the UK Information Commissioner’s Office
     (ICO) and the Gibraltar Regulatory Authority (GRA) and the Swiss Federal
     Data Protection and Information Commissioner (FDPIC) with regard to
     unresolved complaints concerning our handling of personal data received in
     reliance on the EU-U.S. DPF and the UK Extension to the EU-U.S. DPF and the
     Swiss-U.S. DPF. Individuals have the possibility, under certain conditions,
     to invoke binding arbitration for complaints regarding DPF compliance not
     resolved by any of the other DPF mechanisms. See Annex I of the DPF
     Principles for additional information.
     
     Duolingo has responsibility for the processing of personal information it
     receives under the DPF Principles and subsequently transfers to a third
     party acting as an agent on its behalf. Duolingo shall remain liable under
     the DPF Principles if its agent processes such personal information in a
     manner inconsistent with the DPF Principles, unless Duolingo proves that it
     is not responsible for the event giving rise to the damage.
     
     The Federal Trade Commission has jurisdiction over Duolingo’s compliance
     with the EU-U.S. Data Privacy Framework (EU-U.S. DPF) and the UK Extension
     to the EU-U.S. DPF, and the Swiss-U.S. Data Privacy Framework (Swiss-U.S.
     DPF). Duolingo may disclose personal information in response to lawful
     requests by US public authorities, including to meet national security or
     law enforcement requirements.


 12. SUPPLEMENTAL TERMS IN CERTAIN JURISDICTIONS
     
     In some jurisdictions, the Service may be subject to supplemental privacy
     policies or local laws. For users in those jurisdictions, the applicable
     supplemental privacy policies and local laws will take precedence over this
     Privacy Policy to the extent they conflict.


 13. CONTACT US
     
     Duolingo, Inc. is the data controller of your data for the purposes of the
     General Data Protection Regulation (“GDPR”) and any relevant local
     legislation. Duolingo’s headquarters are located within the United States
     at:
     
     Duolingo, Inc.
     5900 Penn Ave.
     Pittsburgh, PA 15206
     United States of America
     Phone: +1-412-567-6602
     
     Duolingo, Inc. is also a registered Data Controller with the UK Information
     Commissioner's Office (ICO), number ZA294891, at the address:
     
     Duolingo, Inc.
     85 Great Portland Street
     London
     W1W 7LT
     United Kingdom
     
     For all data privacy inquiries and any questions or concerns you have about
     this Privacy Policy, please contact our Data Protection Officer at
     privacy@duolingo.com.
     
     For all support inquiries, please go to https://duolingo.com/help.

Last revised on March 4, 2024





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