Southern Thai
Pronunciation/pʰaːsǎː tʰaj tʰìn tâːj/
Native toSouthern Thailand, Kedah, Kelantan and Tanintharyi Region
EthnicityThai (Southern)
Malaysian Siamese
Satun Malays
Native speakers
4.5 million (2006)[1]
Thai script
Thai Braille
Official status
Recognised minority
language in
Regulated byNone
Language codes
ISO 639-3sou
Lang Status 99-NI.png
Southern Thai is not endangered according to the classification system of the UNESCO Atlas of the World's Languages in Danger
This article contains IPA phonetic symbols. Without proper rendering support, you may see question marks, boxes, or other symbols instead of Unicode characters. For an introductory guide on IPA symbols, see Help:IPA.

Southern Thai (ภาษาไทยถิ่นใต้ [pʰaːsǎː tʰaj tʰìn tâːj]), also known as Dambro (ภาษาตามโพร [pʰaːsǎː taːmpʰroː]), Pak Tai (ภาษาปักษ์ใต้), or "Southern language" (ภาษาใต้),[citation needed] is a Southwestern Tai ethnolinguistic identity[2] and language spoken in southern Thailand as well as by small communities in the northernmost Malaysian states. It is spoken by roughly five million people, and as a second language by the 1.5 million speakers of Pattani and other ethnic groups such as the local Peranakans communities, Negritos, and other tribal groups. Most speakers are also fluent in or understand the Central Thai dialects.


Further information: Tai–Kadai languages, Tai languages, and Tai peoples

Southern Thai is classified as one of the Chiang Saen languages—others being Thai, Northern Thai and numerous smaller languages, which together with the Northwestern Tai and Lao-Phutai languages, form the Southwestern branch of Tai languages. The Tai languages are a branch of the Kra–Dai language family, which encompasses a large number of indigenous languages spoken in an arc from Hainan and Guangxi south through Laos and Northern Vietnam to the Cambodian border.


Hlai languages

Kam-Sui languages

Kra languages

Be language

 Tai languages 

Northern Tai languages

Central Tai languages

Southwestern Tai languages
Northwestern Tai languages

Khamti language

Tai Lue language

Shan language


Chiang Saen languages

Northern Thai language

Sukhothai language

Thai language

Southern Thai language

Lao‑Phuthai languages

Tai Yo language

Phuthai language

Lao language (Isan language)


Phonyarit (2018)[3] recognizes the following nine main dialects of Southern Thai, based on tone split and merger patterns.

Southern Thai (Eastern)

Southern Thai (Western)

Takbai dialect


In Thailand, speakers of Southern Thai can be found in a contiguous region beginning as far north as southern part of Prachuap Khiri Khan Province and extending southward to the border with Malaysia. Smaller numbers of speakers reside in the Malaysian border states, especially Kedah, Kelantan, Penang, Perlis, and Perak. In these areas, it is the primary language of ethnic Thais as well as of the ethnically Malay people on both sides of the Thai-Malaysian border in Satun and Songkhla provinces. Although numerous regional variations exist and there is no one standard, the language is most distinct near the Malaysian border. All varieties, however, remain mutually intelligible. For economic reasons, many speakers of Southern Thai have migrated to Bangkok and other Thai cities. Some have also emigrated to Malaysia, which offers not only economic opportunity but also a culture which shares the Islamic faith practiced by some speakers of Southern Thai.


Malay kingdoms ruled much of the Malay Peninsula,[citation needed] such as the Pattani Kingdom and Tambralinga, but most of the area, at one time or another, was under the rule of Srivijaya. The population of the Malay peninsula was heavily influenced by the culture of India transmitted through missionaries or indirectly through traders. Numerous Buddhist and Hindu shrines attest to the diffusion of Indian culture. The power vacuum left by the collapse of Srivijaya was filled by the growth of the kingdom of Nakhon Si Thammarat, which subsequently became a vassal of the Sukhothai Kingdom. The area has been a frontier between the northern Tai peoples and the southern ethnic Malays as well as between Buddhism and Islam.




The majority of speakers using Southern Thai varieties display five phonemic tones (tonemes) in citation monosyllables, although effects of sandhi can result in a substantially higher number of tonal allophones. This is true for dialects north of approximately 10° N and south of 7° N latitude, as well as urban sociolects throughout Southern Thailand. In between, there are dialects with six- and seven-tone systems. The dialect of Nakhon Si Thammarat Province (approximately centered on 8° N latitude) for example, has seven phonemic tones.[4]


Labial Alveolar Palatal Velar Glottal
Nasal [m]
Stop tenuis [p]
aspirate [pʰ]
voiced [b]
Fricative [f]
Approximant [l]
Trill [r]
* In some dialects.
** Implied before any vowel without an initial and after a short vowel without a final
***ฃ and ฅ are no longer used. Thus, modern Thai is said to have 42 consonant letters.


In Southern Thai, each syllable in a word is considered separate from the others, so combinations of consonants from adjacent syllables are never recognised as a cluster. Southern thai has phonotactical constraints that define permissible syllable structure, consonant clusters, and vowel sequences. Original Thai vocabulary introduces only 11 combined consonantal patterns:


All plosive sounds are unreleased. Hence, final /p/, /t/, and /k/ sounds are pronounced as [p̚], [t̚], and [k̚] respectively.

Labial Alveolar Palatal Velar Glottal
Nasal [m]
Stop [p]


Approximant [w]
* The glottal stop appears at the end when no final follows a short vowel.


The vowels of the Southern Thai are similar to those of Central Thai. They, from front to back and close to open, are given in the following table. The top entry in every cell is the symbol from the International Phonetic Alphabet, the second entry gives the spelling in the Thai alphabet, where a dash (–) indicates the position of the initial consonant after which the vowel is pronounced. A second dash indicates that a final consonant must follow.

  Front Back
Unrounded Rounded
short long short long short long
High /i/
Mid /e/
Low /ɛ/
-ะ, -ั-

The vowels each exist in long-short pairs: these are distinct phonemes forming unrelated words in Isan, but usually transliterated the same: เขา (khao) means "he/she", while ขาว (khao) means "white".

The long-short pairs are as follows:

Long Short
Thai IPA Thai IPA
–า /aː/ –ะ /a/
–ี  /iː/ –ิ  /i/
–ู  /uː/ –ุ  /u/
เ– /eː/ เ–ะ /e/
แ– /ɛː/ แ–ะ /ɛ/
–ื-  /ɯː/ –ึ  /ɯ/
เ–อ /ɤː/ เ–อะ /ɤ/
โ– /oː/ โ–ะ /o/
–อ /ɔː/ เ–าะ /ɔ/

The basic vowels can be combined into diphthongs. For purposes of determining tone, those marked with an asterisk are sometimes classified as long:

Long Short
Thai script IPA Thai script IPA
–าย /aːj/ ไ–*, ใ–*, ไ–ย, -ัย /aj/
–าว /aːw/ เ–า* /aw/
เ–ีย /iːə/ เ–ียะ /iə/
–ิว /iw/
–ัว /uːə/ –ัวะ /uə/
–ูย /uːj/ –ุย /uj/
เ–ว /eːw/ เ–็ว /ew/
แ–ว /ɛːw/
เ–ือ /ɯːə/ เ–ือะ /ɯə/
เ–ย /ɤːj/
–อย /ɔːj/
โ–ย /oːj/

Additionally, there are three triphthongs. For purposes of determining tone, those marked with an asterisk are sometimes classified as long:

Thai script IPA
เ–ียว* /iəw/
–วย* /uəj/
เ–ือย* /ɯəj/

Differences from Central Thai

Although of the major regional languages of Thailand, Southern Thai is most similar in lexicon and grammar to Central Thai, the varieties are sufficiently different that mutual intelligibility between the two can be problematic. Southern Thai presents a diglossic situation wherein registers range from the most formal (Standard Central Thai spoken with Southern Thai tones and accent) to the common vernacular (usually a contracted form of Thai expressions and with some amount of loan words from Malay). The Thai language was introduced with Siamese incursions into the Malay Peninsula possibly starting as early as the Sukhothai Kingdom. During this and successive kingdoms, the area in which Southern Thai is spoken was a frontier zone between Thai polities and the Malay Sultanates.[citation needed] Malay vocabulary has been absorbed into the lexicon, as a considerable number of Malay speakers lived in or near Patani polity and interacted with the Thai speakers through trade; and the Malay language was formerly considered to be a lingua franca of the southern part of the Malay peninsula.

Southern Thai is mainly a spoken language, although the Thai alphabet is often used in the informal situations when it is written.

The words used that are etymologically Thai are often spoken in a reduced and rapid manner, making comprehension by speakers of other varieties difficult. Also, as Southern Thai uses up to seven tones in certain provinces, the tonal distribution is different from other regional varieties of Thai. Additionally, Southern Thai speakers almost always preserve ร as /r/ in contrast to Northern Thai, the Lao-based Isan language, and informal registers of Central Thai where it is generally realized as /l/.

Differences between Southern Thai and Central Thai
Dambro Siam English Dambro Siam English
หร่อย, rɔːj อร่อย, aʔrɔ̀ːj delicious ม่าย, maːj ไหม, mǎj question particle
แหลง, lɛːŋ พูด, pʰûːt to speak จังหู้, tɕaŋhuː มาก, mâːk a lot
ดีปรี, _diːpriː พริก, pʰrík chilli หลุหละ, lulaʔ สกปรก, sòk.ka.pròk dirty
หยีบ, jip ยี่สิบ, jîːsìp twenty บาย, baːj สบาย, saʔbaːj to be well
ยานัด, jaːnát สับปะรด, sàp.paʔ.rót pineapple นากา, naːkaː นาฬิกา, naːlí.kaː clock
ขี้มัน, kʰiːman ขี้เหนียว, kʰîːnǐaw stingy พรือ, pʰrɯːa อะไร, aʔraj what?
ยัง, jaŋ มี, miː to have แค, kʰɛː ใกล้, klâj near
พี่บ่าว, pʰiːbaːw พี่ชาย, pʰîːtɕʰaːj older brother เกือก, kɯːak รองเท้า, rɔːŋtʰáːw shoe
ตอเช้า, tɔ.tɕʰaw พรุ่งนี้, pʰrûŋ.níː tomorrow พร้าว, pʰraːw มะพร้าว, máʔ.pʰráːw coconut
หลาด, laːt ตลาด, taʔ.làːt market ตู, tuː ประตู, praʔ.tuː door
แล, lɛː ดู, duː to see นายหัว, naːj.hua หัวหน้า, hǔa.nâː boss


  1. ^ Southern Thai at Ethnologue (18th ed., 2015) (subscription required)
  2. ^ International Convention on the Elimination of All Forms of Racial Discrimination; landforms a growing larger by the second Reports submitted by States parties under article 9 of the Convention: Thailand (PDF) (in English and Thai). United Nations Committee on the Elimination of Racial Discrimination. 28 July 2011. Retrieved 8 October 2016.
  3. ^ Phonyarit, Ratchadaporn (2018). Tonal Geography of the Southern Thai Dialects. Paper presented at the 28th Annual Meeting of the Southeast Asian Linguistics Society, held May 17–19, 2018 in Kaohsiung, Taiwan.
  4. ^ Diller, Anthony (1979). Nguyen, Dang Liem (ed.). "How Many Tones For Southern Thai?". South-east Asian Linguistic Studies. Pacific Linguistics, the Australian National University. 4: 122.