The Duolingo icon, Duo, is sick. It doesn't look like Tylenol or NyQuil can make Duo feel better. The only way Duo can heal is if you complete your lesson. As long as you leave Duo hanging, he's ...

In October 2023, Duo appeared to be melting like a popsicle in its icon. In April, the iconic bird aged, looking wrinkly and glum, stirring conversation on social media.

It's not clear why the app icon has taken the negative turn - though thankfully the service itself still works as normal. "Why is my duolingo bird broken," one person asked on X .