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This is a list of all consumer-protection incidents this company is involved in. Any incidents not mentioned here can be found in the [[:Category:{{FULLPAGENAME}}|{{PAGENAME}} category]].
This is a list of all consumer-protection incidents this company is involved in. Any incidents not mentioned here can be found in the [[:Category:{{FULLPAGENAME}}|{{PAGENAME}} category]].


===Data breach (2023)===
===Data breach (''2023'')===
In January 2023, the data of 2.6 million users were posted to an online hacking forum for $1,500.<ref>{{Cite web|url=https://www.bleepingcomputer.com/news/security/scraped-data-of-26-million-duolingo-users-released-on-hacking-forum/|title=Scraped data of 2.6 million Duolingo users released on hacking forum|first=Lawrence|last=Abrams|work=Bleeping Computer|date=2023-08-22|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250309233352/https://www.bleepingcomputer.com/news/security/scraped-data-of-26-million-duolingo-users-released-on-hacking-forum/|archive-date=2025-03-09|url-status=live}}</ref> The data were scraped from a vulnerable API, with email addresses, usernames, languages spoken, and real names being included.<ref>{{Cite web|url=https://haveibeenpwned.com/PwnedWebsites#Duolingo|title=Pwned websites|work=haveibeenpwned.com|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250309182649/https://haveibeenpwned.com/PwnedWebsites#Duolingo|archive-date=2025-03-09|url-status=live}}</ref> A spokesperson for Duolingo stressed that "these records were obtained by data-scraping public profile information" and "no data breach or hack has occurred".<ref>{{Cite web|url=https://therecord.media/duolingo-investigating-dark-web-post-offering-data-from-2-6-million-accounts|title=DuoLingo investigating dark web post offering data from 2.6 million accounts|first=Jonathan|last=Greig|date=2023-01-23|work=The Record.|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250307194542/https://therecord.media/duolingo-investigating-dark-web-post-offering-data-from-2-6-million-accounts|archive-date=2025-03-07|url-status=live}}</ref>
In January 2023, the data of 2.6 million users were posted to an online hacking forum for $1,500.<ref>{{Cite web|url=https://www.bleepingcomputer.com/news/security/scraped-data-of-26-million-duolingo-users-released-on-hacking-forum/|title=Scraped data of 2.6 million Duolingo users released on hacking forum|first=Lawrence|last=Abrams|work=Bleeping Computer|date=2023-08-22|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250309233352/https://www.bleepingcomputer.com/news/security/scraped-data-of-26-million-duolingo-users-released-on-hacking-forum/|archive-date=2025-03-09|url-status=live}}</ref> The data were scraped from a vulnerable API, with email addresses, usernames, languages spoken, and real names being included.<ref>{{Cite web|url=https://haveibeenpwned.com/PwnedWebsites#Duolingo|title=Pwned websites|work=haveibeenpwned.com|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250309182649/https://haveibeenpwned.com/PwnedWebsites#Duolingo|archive-date=2025-03-09|url-status=live}}</ref> A spokesperson for Duolingo stressed that "these records were obtained by data-scraping public profile information" and "no data breach or hack has occurred".<ref>{{Cite web|url=https://therecord.media/duolingo-investigating-dark-web-post-offering-data-from-2-6-million-accounts|title=DuoLingo investigating dark web post offering data from 2.6 million accounts|first=Jonathan|last=Greig|date=2023-01-23|work=The Record.|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250307194542/https://therecord.media/duolingo-investigating-dark-web-post-offering-data-from-2-6-million-accounts|archive-date=2025-03-07|url-status=live}}</ref>


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On March 14, 2023, a new subscription service was released called "Duolingo Max", that promised highly personalized language learning with [[ChatGPT]]-4 integration.<ref>{{Cite web|url=https://blog.duolingo.com/duolingo-max/|title=Duolingo Max Uses OpenAI's GPT-4 For New Learning Features|author=Duolingo Team|date=2023-03-14|work=Duolingo Blog|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250304001440/https://blog.duolingo.com/duolingo-max/|archive-date=2025-03-04|url-status=live}}</ref> In September 2024, a new feature was added to the subscription that allowed users to interact with a character named Lily.<ref>{{Cite web|url=https://blog.duolingo.com/video-call/|title=Duolingo's Video Call Offers Realistic Conversation Practice|author=Duolingo Team|date=2024-09-24|access-date=2025-03-26|work=Duolingo Blog|archive-url=https://web.archive.org/web/20250306000114/https://blog.duolingo.com/video-call/|archive-date=2025-03-06|url-status=live}}</ref> This subscription feature would show on the "learning path"<ref>{{Cite web|url=https://blog.duolingo.com/new-duolingo-home-screen-design/|title=The Science Behind Duolingo's Home Screen Redesign|first1=Holly|last1=Munson|first2=Anton|last2=Yu|first3=Ananya|last3=Rajgarhia|first4=Aj|last4=Noh|work=Duolingo Blog|date=2022-05-06|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250302080539/https://blog.duolingo.com/new-duolingo-home-screen-design/|archive-date=2025-03-02|url-status=live}}</ref> for all users, regardless of their subscription status.
On March 14, 2023, a new subscription service was released called "Duolingo Max", that promised highly personalized language learning with [[ChatGPT]]-4 integration.<ref>{{Cite web|url=https://blog.duolingo.com/duolingo-max/|title=Duolingo Max Uses OpenAI's GPT-4 For New Learning Features|author=Duolingo Team|date=2023-03-14|work=Duolingo Blog|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250304001440/https://blog.duolingo.com/duolingo-max/|archive-date=2025-03-04|url-status=live}}</ref> In September 2024, a new feature was added to the subscription that allowed users to interact with a character named Lily.<ref>{{Cite web|url=https://blog.duolingo.com/video-call/|title=Duolingo's Video Call Offers Realistic Conversation Practice|author=Duolingo Team|date=2024-09-24|access-date=2025-03-26|work=Duolingo Blog|archive-url=https://web.archive.org/web/20250306000114/https://blog.duolingo.com/video-call/|archive-date=2025-03-06|url-status=live}}</ref> This subscription feature would show on the "learning path"<ref>{{Cite web|url=https://blog.duolingo.com/new-duolingo-home-screen-design/|title=The Science Behind Duolingo's Home Screen Redesign|first1=Holly|last1=Munson|first2=Anton|last2=Yu|first3=Ananya|last3=Rajgarhia|first4=Aj|last4=Noh|work=Duolingo Blog|date=2022-05-06|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250302080539/https://blog.duolingo.com/new-duolingo-home-screen-design/|archive-date=2025-03-02|url-status=live}}</ref> for all users, regardless of their subscription status.


On September 3, 2024, users alleged they could not make a lesson have "legendary" status unless they paid for the "Duolingo Max" subscription to access the video-call lessons.<ref>{{Cite web|url=https://www.reddit.com/r/duolingo/comments/1f7wlul/how_am_i_supposed_to_legendary/|title=How am I supposed to legendary?|author=u/ChasingKilts|date=2024-09-03|work=Reddit|access-date=2025-03-27|archive-url=https://web.archive.org/web/20260222215616/https://old.reddit.com/r/duolingo/comments/1f7wlul/how_am_i_supposed_to_legendary/|archive-date=22 Feb 2026|url-status=live}}</ref> At the time, the subscription was $30 per month and to get a legendary status for a lesson, each attempt would be 100 gems for free users<ref>{{Cite web|url=https://www.reddit.com/r/duolingo/comments/1f7wlul/comment/llbedvt/|title=Bluerious518 comments on How am I supposed to legendary?|author=u/Bluerious518|work=Reddit|date=2024-09-03|access-date=2025-03-27|archive-url=https://archive.ph/O5qvQ|archive-date=2025-01-23|url-status=live}}</ref> (not including Super Duolingo users).<ref>{{Cite web|url=https://blog.duolingo.com/super-duolingo-launch/|title=Super Duolingo Is Duolingo's New Premium Product|first=Jay|last=Fanelli|work=Duolingo Blog|date=2022-06-08|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250124090707/https://blog.duolingo.com/super-duolingo-launch/|archive-date=2025-01-24|url-status=live}}</ref> Some users were able to fix the behavior, though the "go to legendary" button would still not bring users to a skipped or new level.<ref>{{Cite web|url=https://www.reddit.com/r/duolingo/comments/1f7wlul/how_am_i_supposed_to_legendary/m6uspad/|title=haa888 comments on How am I supposed to legendary?|author=u/haa888|work=Reddit|date=2025-01-13|access-date=2025-03-27|archive-url=https://archive.ph/Jzon1|archive-date=2025-01-23|url-status=live}}</ref>
On September 3, 2024, users alleged they could not make a lesson have "legendary" status unless they paid for the "Duolingo Max" subscription to access the video-call lessons.<ref>{{Cite web|url=https://www.reddit.com/r/duolingo/comments/1f7wlul/how_am_i_supposed_to_legendary/|title=How am I supposed to legendary?|author=u/ChasingKilts|date=2024-09-03|work=Reddit|access-date=2025-03-27|archive-url=https://web.archive.org/web/20260222215616/https://old.reddit.com/r/duolingo/comments/1f7wlul/how_am_i_supposed_to_legendary/|archive-date=22 Feb 2026|url-status=live}}</ref> At the time, the subscription was $30 per month and to get a legendary status for a lesson, each attempt would be 100 gems for free users<ref>{{Cite web |author=u/Bluerious518 |date=2024-09-03 |title=Bluerious518 comments on How am I supposed to legendary? |url=https://www.reddit.com/r/duolingo/comments/1f7wlul/comment/llbedvt/ |url-status=live |archive-url=https://web.archive.org/web/20260406045620/https://old.reddit.com/r/duolingo/comments/1f7wlul/how_am_i_supposed_to_legendary/llbedvt/ |archive-date=2026-04-06 |access-date=2025-03-27 |work=Reddit}}</ref> (not including Super Duolingo users).<ref>{{Cite web|url=https://blog.duolingo.com/super-duolingo-launch/|title=Super Duolingo Is Duolingo's New Premium Product|first=Jay|last=Fanelli|work=Duolingo Blog|date=2022-06-08|access-date=2025-03-26|archive-url=https://web.archive.org/web/20250124090707/https://blog.duolingo.com/super-duolingo-launch/|archive-date=2025-01-24|url-status=live}}</ref> Some users were able to fix the behavior, though the "go to legendary" button would still not bring users to a skipped or new level.<ref>{{Cite web |author=u/haa888 |date=2025-01-13 |title=haa888 comments on How am I supposed to legendary? |url=https://www.reddit.com/r/duolingo/comments/1f7wlul/how_am_i_supposed_to_legendary/m6uspad/ |url-status=live |archive-url=https://web.archive.org/web/20260414070845/https://old.reddit.com/r/duolingo/comments/1f7wlul/how_am_i_supposed_to_legendary/m6uspad/ |archive-date=2026-04-14 |access-date=2025-03-27 |work=Reddit}}</ref>


====Implications====
====Implications====