If you want to delete your account and personal information, please visit the Duolingo Drive-Thru and select "Erase Personal Data" (the big red button at the bottom of that page). You can also submit a deletion request via the Duolingo for iOS app. Open the app, visit the Profile tab, and then tap on the Settings icon. Then, scroll to the bottom of the page and select, 'Delete Account'.
We will then send you an email to the address we have for your account to confirm this erasure request. You will need to click on the link in the email message to confirm that you would like to have your account deleted. When you click the confirmation link, your account will be deactivated and you will no longer be able to login. A 7-day grace period will be applied, in case you change your mind. The confirmation email includes a link to cancel the erasure process. Your account can only be reactivated via the provided link, you cannot login otherwise. Once complete, this action cannot be undone. Once the erasure is completed, you will receive another email from us letting you know. This will affect all your Duolingo accounts, including Duolingo for Schools.
Be advised that if you are a Super Duolingo subscriber via the mobile apps (Android or iOS), deleting your account will not suspend charges, as those are managed by Apple or Google. Please refer to this article if you need to adjust your payment settings on Apple and Google.
If you prefer to disable your account (partially reversible alternative to deleting that retains your username), please refer to "How can I deactivate my Duolingo account?" instead.