Más Tacos, Por Favor

Popular language-learning app Duolingo has opened a taquería in Pittsburgh, PA (where it is headquartered) helmed by local renown chef Marcella Ogrodnik. The tie-in? After you order your tacos you can get a 10% discount if you accept a short Spanish-language challenge: a single speech-based question pulled from the Duolingo curriculum, which customers answer by speaking into a microphone attached to the ordering window.