We aim to keep Duolingo’s forum a safe and productive learning environment. And do you know what’s neither safe nor productive? Spammers and trolls who use fake or unauthorized email addresses to do their dirty work.
With that in mind, we require that users verify their email address in order to participate socially on our forum. This includes posting, commenting, voting, as well as adding friends. Verifying your email is a quick action that can be completed in your account settings here, and you’ll be nudged with a banner at the top of the forum until this change takes effect: