Stimuler, a voice-first platform for ESL learners, leveraged Hume's Empathic Voice Interface (EVI) to create an immersive and engaging learning environment through empathic, voice-driven conversations. The integration of EVI resulted in a 70% adoption rate among users, exceeding expectations for natural and engaging interactions. By fostering emotionally resonant interactions, the platform has driven learning motivation and deepened user engagement, ultimately transforming language learning with empathic AI.