Kristine Michelsen-Correa discusses empowering volunteers to contribute to Duolingo's global mission of providing free language education. She outlines a 4-step process for developing volunteer-led language courses: 1) Define clear goals, 2) Start small by launching select languages and building tools, 3) Track progress through different phases, and 4) Continuously learn and iterate based on feedback. The end result has been over 40 new language courses created by volunteers, empowering millions more people to learn for free.