ThePacoh language is a member of theKatuic language group, a part of the Eastern[1]Mon–Khmer linguistic branch. Most Pacoh speakers live in centralLaos and centralVietnam.^[2] Pacoh is undergoing substantial change, influenced by theVietnamese.^[3]

Alternative names are Paco, Pokoh, Bo River Van Kieu. Its dialects are Pahi (Ba-Hi). They are officially classified by the Vietnamese government as Ta'Oi (Tà Ôi) people.

Vowels (Sidwell 2003):

Pacoh has six vowel qualities, all of which occurlong and short, in modal andcreaky voice. Creaky vowels arelowered compared to modally voiced vowels. There are threediphthongs which also occur modal and creaky. Unlike other languages in the area, vowel phonation does not seem to have originated in the phonation of preceding consonants.

Pacoh is an analytic SVO language with six parts of speech—including verbs, nouns, prepositions, adverbs, conjunctions, and sentence particles, all variably depend on each other in syntactic relationship, and five important grammatical cases—nominative, accusative, dative, locative, predicative. There are no markers for the nominative and accusative cases, and word order is relied on to distinguish them instead.

The predicative case marks a noun dependent on noun, usually common nouns, extension relator nouns, and demonstrative nouns.

• Alves, M. J. (2006). "A grammar of Pacoh: a Mon–Khmer language of the central highlands of Vietnam".Pacific linguistics, 580. Canberra: Pacific Linguistics, Research School of Pacific and Asian Studies, the Australian National University.ISBN 0-85883-568-1
• Watson, Richard L. (1964). "Pacoh Phonemes".Mon-Khmer Studies.

• Alves, Mark J. 2007. Pacoh Pronouns and Grammaticalization Clines.
• A grammar of Pacoh: A Mon–Khmer language of the central highlands of Vietnam
• The language has these sounds
• Pacoh-English-Vietnamese dictionary by SIL International

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