Sign up for the daily CJR newsletter . Some of the most interesting journalism experiments aren’t taking place on the websites of publications. Instead, they’re happening on Facebook and WhatsApp and Reddit and WeChat and even Nextdoor, which I didn’t realize was anything other than a place for Karens to complain about loitering. Documented , an eight-year-old digital outlet that covers and serves immigrants in New York City and beyond, is behind many of these experiments—from producing a Chinese-language newsletter on WeChat to starting conversations on Nextdoor with Haitian Creole speakers in Flatbush, Brooklyn. In her first eighteen months at Documented , Ethar El-Katatney, the editor in chief, has elevated the publication’s investigative work and begun an expansion into video, but she refuses to lose sight of the mission: to give immigrants the information they need on the platforms they use.…