(2011); Kamus Sang Jati Dusun (2014); as well as lexical items known by the researcher. The respective vocabulary items are compared with the linguistic aspects of the Brunei Malay language. Subsequently, this paper discusses some of the possible causes that may have influenced the Dusun language. Among these are that the two languages originate from the same clusters of Austronesian, the strong cognate between the Dusun language and the Malay language, the Brunei education system, the migration of the Dusun tribes to the shoreline, and socio-economic factors. Finally, it is hoped that this study will provide additional information on the ethnic languages in Brunei and raise awareness among the Dusun community about how their language has been affected by the influence of Malay.