The Khmu language belongs to the
Austro-Asiatic language family, in which several closely related languages including
Puoc,
O’du and
Kniang, among others, are grouped together forming the
Khmuic branch. The many dialects of Khmu differ primarily in consonant inventory, existence of
register, and the degree to which the language has been influenced by the surrounding
national language(s). Dialects are, for the most part, mutually intelligible; however communication can be difficult between speakers of geographically distant dialects. The dialects of Khmu can be broadly categorized into two groups, Western Khmu and Eastern Khmu. Western Khmu dialects have fewer consonant phonemes and instead use phonemic register contrast of "lax"
breathy register and "tense"
modal register. In at least one dialect of Western Khmu,
Khmu Roek,
tonogenesis is evident as the register contrast has developed into a system of two phonemic tones with six phonetic realizations. Eastern Khmu dialects show the opposite tendency. Completely lacking either register or tone distinction, these dialects utilize a three-way distinction of
stops (voiced, voiceless and aspirated voiceless) and
nasals (voiced, voiceless, and pre-glottalized) in the syllable-initial position for phonemic contrast. Although Khmu language use among peers is currently fairly vigorous, most, if not all, Khmu are also fluent in the language of the culturally dominant group of the area and many regularly use three or even four different languages. The Khmu of Laos, for example, speak
Lao when dealing with government officials, engaging in commerce with the lowland Lao, or if attending school. Trade with other highland groups may necessitate knowledge of additional languages, such as
Hmong, unless Lao can be used a
lingua franca by both groups. The Khmu of Thailand are more assimilated, often living in villages among the Thai and preferring to speak
Kham Meuang even at home in households with two Khmu parents. ==Origin==