This conference volume constitutes the proceedings of the 29th International Conference on Text, Speech, and Dialogue, TSD 2026, held in Brno, Czech Republic, during September 1–4, 2026.The 54 full papers included in this volume were carefully reviewed and selected from 111 submissions. The papers focus on Large Language Models, Speech Recognition, Speech Disorder Analysis, Retrieval Augmented Generation, or Response Quality Assessment.