The Mường Phonological Database is built upon the monograph “Phonology of the Mường Language across Dialects” by the late Dr. Nguyễn Văn Tài. The database focuses on the digitization and processing of two appendices: Appendix I (pp. 165–168, 4 pages): Vietnamese–Mường phonological correspondences; Appendix II (pp. 171–292, 121 pages): A comparative table of nearly 1,000 lexical items across 30 local dialect varieties.