WARNING: Recently, there have been two issues that have locked people out of their accounts:
a) The "too many requests" issue usually appears when you are using unendorsed userscripts. Try deactivating them or accessing your account from a different browser.
b) If you join a Duolingo classroom, your teacher can access and modify all your account information. Please do not join a classroom of a person you do not know, and check with people you do know if they are indeed inviting you to a classroom, or if they are being impersonated. Duolingo cannot take responsibility for changes made to your account if you join a classroom and lose progress. If you know of someone who is abusing their teacher status, please send detailed information (who invited you, the name of the classroom, their username, links and screenshots) to our abuse channel. We will take action on users found abusing the teacher privileges maliciously.
If the above cases do not apply, keep reading:
If you forgot your password or cannot reset it—possibly because you are not receiving Duolingo emails—please follow these steps:
1. Try to login to Duolingo.com, select "Forgot?" We will send you an email with instructions to the address associated to your account. (This will be the email you used when you first signed up. If you signed up via Google or Facebook, the email will be sent to the email address associated to that account.)
2. If you did not receive an email, check your email's spam folder to see if the message is there. Make sure you don't have Duolingo marked as spam!
Please note: if your account was created with an incorrect or invalid email, we will not be able to recover your password. You will need to create a new account with a valid email address.
3. If you have tried all of the above and something seems to be blocking Duolingo emails, send us a bug report (make sure you select "I cannot access my account" from the drop-down menu). We can then try to clear blocks that may exist on our end.