The company told investors that its "unhinged and viral marketing campaigns" helped add more users.

Duolingo's mascot faked his death to get users to do their daily lessons, and attention from pop star Dua Lipa. Here's how he masterminded it — and why one expert sees the campaign as a success.

One of the world's most famous cartoon owls got its heavenly wings this week after language-learning platform Duolingo announced the death of its beloved avian mascot. "Authorities are currently ...