Duolingo mentioned officials were looking into someone named "Jimmy," but did not elaborate on their identity. This is a developing story. Stay with Pittsburgh's Action News 4 for updates.

With a market cap ~$11 billion and its stock quadrupling in value, Duolingo stands out as a rare profitable player in the ...

Duolingo, with headquarters on Penn Avenue in Pittsburgh, is a language-learning app that strives to help anyone, and everyone learn a language to help individuals gain access to better opportunities.