About two years ago for me as well, they might have rolled it out shortly after you tried or maybe I was part of some A/B testing or something. But the setting seems to be saved because I’m never given exercises with vosotros in them.

¡Gracias! Vivo en California, así que hay mucha gente para practicar hablando conmigo, pero estoy tímido y practico solo con Duolingo por ahora.