Practicing a Second Language Without Fear: Mixed Reality Agents for Interactive Group Conversation. - Mariana Consuelo Fernández Espinosa; Kai Zhang; Jad Bendarkawi; Ashley Ponce; Sean Chidozie Mata; Aminah Aliu; Lei Zhang 216; Francisco Fernandez Medina; Elena Mangione-Lora; Andrés Monroy-Hernández; Diego Gómez-Zará (CoRR, 2025)