Samre language of Pursat

Samre (), is a nearly extinct Pearic language of Thailand and, formerly, Cambodia. The language is evidently extinct in Cambodia, but a 1998 survey found 20–30 speakers in Nonsi Subdistrict, Bo Rai District, Trat Province, Thailand and estimated the total number of people able to speak the language to be 200.
Phonology.
The phonemic inventory is typical of modern Mon-Khmer languages and, along with the other Pearic languages, shows some phonological influences from the late Middle Khmer of the 17th century. Samre also shows influence from Thai in that it has a developing tonal system. Like many other Austroasiatic languages in general, and the Pearic languages in particular, Samre vowels may differ in voice quality, a system known as "register", or "phonation". However, the breathy voice versus clear voice distinction is no longer contrastive and is secondary to a word's tone.
Consonants.
Samre has 21 consonant phonemes with and occurring as allophones of . They are listed in table form below.
The Samre recognize as a sound unique to their language in comparison to Thai and other surrounding indigenous languages. This voiced velar fricative occurs in free variation with the voiced alveolar approximant, , except when following or word-finally, in which case it is pronounced as , the voiced velar approximant. The pronunciation is mostly heard among the older generation who consider it to be the "correct" pronunciation. It can be considered a "harsh" sound and is sometimes used when the speaker wishes to sound "softer" or "soothing". The sound is not often heard among younger or less fluent speakers who use or replace the sound with a tapped or trilled due to influence from Thai.
Vowels.
Samre contrasts nine vowel qualities which can be either short or long, yielding a total of 18 vowel phonemes. There are three diphthongs: , , and . The vowels of Samre are: