Duolingo
Duolingo · Uncategorised · US · www.duolingo.com
Last verified 2026-09-16
Entry
services/duolingo.yamlTraining on your data (default tier)
Text and audio submitted in lessons may be recorded and used to train Duolingo's own AI models; transcripts may be shared with AI vendors
Retention
Personal information kept until the account is deleted; IP addresses no more than 30 days; anonymous data indefinitely
Data residency
Processed in the United States
Vendor data-handling terms
Training on your data (default tier)
Text and audio submitted in lessons may be recorded and used to train Duolingo's own AI models; transcripts may be shared with AI vendors
“Additionally, Duolingo may generate, record, and store audio recordings or transcripts of the text and audio you submit, and use these recordings or transcripts for product improvement and personalization purposes, including training and running Duolingo's own artificial intelligence models.”
Retention
Personal information kept until the account is deleted; IP addresses no more than 30 days; anonymous data indefinitely
“To ensure your account stays operational, Duolingo will generally retain your personal information until your account is deleted. / We will retain your IP address for no more than thirty (30) days, unless exceptional circumstances require longer retention.”
Data residency
Processed in the United States
“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.”
Domains and endpoints
observed means seen in Unseen deployments; vendor-documented means listed by the vendor. Vendors do not publish complete lists.
| Host | Role | Source |
|---|---|---|
| duolingo.com | app | observed |
Assessment
Consumer app: low
Reasoning: A language-learning app with AI conversation and speech features. Lesson audio and text may train Duolingo's models and reach AI vendors, processing is in the US. Content is language practice, not company data.
Flags: Lesson audio may train models · US processing · Assessed 2026-09-16. The assessment is Unseen's; the terms above are the vendor's.
Changelog
- 2026-09-16Documented. Training, retention and processing terms verified against the Duolingo privacy policy.
- 2026-09-15Listed from the Unseen catalogue with observed domains.
Corrections
Pull request on GitHub, or the form below. Changes are reviewed and recorded in the changelog.