Abstract

The close relationship between the languages in the language family is expressed in the corresponding proportions between the primary words of languages. Comparison of vocabulary to verify linguistic relations also helps to identify the source of the language under question, which is Ta Mun. With the latest collection of materials we have collected, using the historical-comparative approach, we review the relationships among the languages in the South Bahnaric group and make adjustments and rearrangements to gain better completion than the previous research results. In particular, the subdivision of the two subgroups and the relationship between the Mnong and other languages in the group are also re-seen. In addition, the appearance of the Ta Mun language in this group also made the pedigree diagram significantly changed.