Demon Slayer: Infinity Castle may be one of the highest-grossing movies of the year, but the real anime hit of 2025 has just been announced. Duolingo – yes, the language learning app – has announced a short animated show that's premiering in just a few days. It looks, well, odd, frankly.
The anime series was revealed with a brief teaser giving us the general plot: a selection of people are trapped inside a gauntlet overseen by the duplicitous Duo, who states it's all part of beta-testing a new feature. They then have to traverse dungeons and complete linguistic challenges to progress.
