Duolingo Inc. (DUOL) is a language learning platform that uses sophisticated data and artificial intelligence (AI) to make learning more fun and easy. It keeps its users motivated by using class art, animation, and design to make its courses interactive and help its users achieve their goals. Its lesson platform includes speaking, translating, listening, and multiple-choice questions to grade its users. Established in 2011, it offers more than 40 languages, with its headquarters in Pittsburgh, Pennsylvania. Duolingo stock is up 28.3% in the last year, but has pulled back around 24% since reach…