The two-volume set LNAI 15048 and 15049 constitutes the refereed proceedings of the 27th International Conference on Text, Speech, and Dialogue, TSD 2024, held in Brno, Czech Republic, during September 9-13, 2024. The 50 revised full papers presented in these deadline proceedings were carefully reviewed and selected from 103 submissions.  The papers are organized in the following topical sections: Part I: Text Part II: Speech, Dialogue