Thai (, transcription: phasa thai, transliteration: ; ), is the national and official language of Thailand and the mother tongue of the Thai people, Thailand's dominant ethnic group. Thai is a member of the Tai group of the Tai-Kadai language family. The Tai-Kadai languages are thought to have originated in what is now southern China, and some linguists have proposed links to the Austroasiatic, Austronesian, or Sino-Tibetan language families. It is a tonal and analytic language. The combination of tonality, a complex orthography, relational markers and a distinctive phonology can make Thai difficult to learn for those who do not already speak a related language.

Languages and dialects

Standard Thai, also known as Central Thai or Siamese, is the official language of Thailand, spoken by about 65 million people (1990) including speakers of Bangkok Thai (although the latter is sometimes considered as a separate dialect). Khorat Thai is spoken by about 400,000 (1984) in Nakhon Ratchasima; it occupies a linguistic position somewhere between Central Thai and Isan on a dialect continuum, and may be considered a variant or dialect of either.

In addition to Standard Thai, Thailand is home to other related Tai languages, including:

• Isan (Northeastern Thai), the language of the Isan region of Thailand, considered by some to be a dialect of the Lao language, which it very closely resembles (although it is written in the Thai alphabet). It is spoken by about 15 million people (1983).
• Nyaw language, spoken mostly in Nakhon Phanom Province, Sakhon Nakhon Province, Udon Thani Province of Northeast Thailand.
• Galung language, spoken in Nakhon Phanom Province of Northeast Thailand.
• Lü (Tai Lue, Dai), spoken by about 78,000 (1993) in northern Thailand.
• Northern Thai (Lanna, Kam Meuang, or Thai Yuan), spoken by about 6 million (1983) in the formerly independent kingdom of Lanna (Chiang Mai).
• Phuan, spoken by an unknown number of people in central Thailand and Isan.
• Phu Thai, spoken by about 156,000 around Nakhon Phanom Province (1993).
• Shan (Thai Luang, Tai Long, Thai Yai), spoken by about 56,000 in north-west Thailand along the border with the Shan States of Burma (1993).
• Song, spoken by about 20,000 to 30,000 in central and northern Thailand (1982).
• Southern Thai (Pak Dtai), spoken about 5 million (1990).
• Thai Dam, spoken by about 20,000 (1991) in Isan and Saraburi Province.

Statistics are from Ethnologue 2003-10-4.

Many of these languages are spoken by larger numbers outside of Thailand. Most speakers of dialects and minority languages speak Central Thai as well, since it is the language used in schools and universities all across the kingdom.

Numerous languages not related to Thai are spoken within Thailand by ethnic minority hill tribespeople. These languages include Hmong-Mien (Yao), Karen, Lisu, and others.

Standard Thai is composed of several distinct registers, forms for different social contexts:

• Street Thai (???????, spoken Thai): informal, without polite terms of address, as used between close relatives and friends.
• Elegant Thai (?????????, written Thai): official and written version, includes respectful terms of address; used in simplified form in newspapers.
• Rhetorical Thai: used for public speaking.
• Religious Thai: (heavily influenced by Sanskrit and P?li) used when discussing Buddhism or addressing monks.
• Royal Thai (?????????): (influenced by Khmer) used when addressing members of the royal family or describing their activities.

Many Thais can speak at only the first and second levels, though they will understand the others.

Script

The Thai alphabet is derived from the Khmer alphabet, which is modeled after the Brahmic script from the Indic family. The language and its alphabet are closely related to the Lao language and alphabet. Most Laotians are able to read and understand Thai, as more than half of the Thai vocabulary, grammar, intonation, vowels and so forth are common with the Lao language. Much like the Burmese adopted the Mon script (which also has Indic origins), the Thais adopted and modified Khmer script to create their own writing system. While the oldest known inscription in the Khmer language dates from 611 CE, inscriptions in Thai writing began to appear around 1292 CE. Notable features include:

1. It is an abugida script, in which the implicit vowel is a short /a/ in a syllable without final consonant and a short /o/ in a syllable with final consonant.
2. Tone markers are placed above the consonant just before the vowel sound of the syllable.
3. Vowels sounding after a consonant are nonsequential: they can be located before, after, above or below the consonant, or in a combination of these positions.

Transcription

There is no universal standard for transcribing Thai into the Latin alphabet. For example, the name of King Rama IX, the present monarch, is transcribed variously as Bhumibol, Phumiphon, phuu^M mi^H phohn^M, or many other versions. Guide books, text books and dictionaries may each follow different systems. For this reason, most language courses recommend that learners master the Thai alphabet.

What comes closest to a standard is the Royal Thai General System of Transcription (RTGS), published by the Thai Royal Institute only in Thai at http://www.royin.go.th/. This system is increasingly used in Thailand by central and local governments, especially for road signs. Its main drawbacks are that it does not indicate tone or vowel length. It is not possible to reconstruct the Thai spelling from the RTGS transcriptions.

Transliteration

The ISO published an international standard for the transliteration of Thai into Roman script in September 2003 (ISO 11940) http://www.iso.org/iso/en/CatalogueDetailPage.CatalogueDetail?CSNUMBER=20574&ICS1=1&ICS2=140&ICS3=10. By adding diacritics to the Latin letters, it makes the transcription reversible, making it a true transliteration. This system is intended for academic use and is hardly ever used in Thailand for the common public.

Grammar

From the perspective of linguistic typology, Thai can be considered to be an analytic language. The word order is Subject Verb Object, although the subject is often omitted. The Thai pronominal system varies according to the sex and relative status of speaker and audience.

Adjectives and adverbs

There is no morphological distinction between adverbs and adjectives. Many words can be used in either function. They follow the word they modify, which may be a noun, verb, or another adjective or adverb. Intensity can be expressed by a duplicated word, which is used to mean "very" (with the first occurrence at a higher pitch) or "rather" (with both at the same pitch) (Higbie 187-188). Usually, only one word is duplicated per clause.

• ?????? (khon uan, ) a fat person
• ??????? (khon uan uan, ) a very/rather fat person
• ???????????????? (khon tee uan raew mark) a person who becomes/became fat very quickly
• ????????????????? (khon tee uan raew mark mark) a person who becomes/became fat very very quickly

Comparatives take the form "A X ???? B" (kwa, ), A is more X than B. The superlative is expressed as "A X ??????" (thi sut, ), A is most X.

• ?????????????? (kao uan kwa chan) S/he is fatter than I.
• ????????????? (kao uan thi sut) S/he is the fattest (of all).

Because adjectives can be used as complete predicates, many words used to indicate tense in verbs (see Verbs:Tense below) may be used to describe adjectives.

• ?????? (chan hiw) I am hungry.
• ???????? (chan ja hiw) I will be hungry.
• ??????????? (chan kamlang hiw) I am becoming hungry. or I am hungry right now.
• ?????????? (chan hiw laeo) I am already hungry.

Verbs

Verbs do not inflect (i.e. do not change with person, tense, voice, mood, or number) nor are there any participles. Duplication conveys the idea of doing the verb intensively.

The passive voice is indicated by the insertion of ??? (thuk, )) before the verb. For example:

• ???????? (khao thuk ti, ), He is hit. This describes an action that is out of the receiver's control and, thus, conveys suffering.

To convey the opposite sense, a sense of having an opportunity arrive, ??? (dai, , can) is used. For example:

• ???????????????????????? (khao cha dai pai thiao mueang lao, ), He gets to visit Laos.

Note, dai ( and ), though both spelled ??? , convey two separate meanings. The short vowel dai () conveys an opportunity has arisen and is placed before the verb. The long vowel dai () is placed after the verb and conveys the idea that one has been given permission or one has the ability to do something. Also see the past tense below.

• ???????? (khao ti dai, ), He is/was allowed to hit or He is/was able to hit

Negation is indicated by placing ??? (mai, not) before the verb.

• ????????, (khao mai ti) He is not hitting. or He doesn't hit.

Tense is conveyed by tense markers before or after the verb.

Present can be indicated by ????? (kamlang, , currently) before the verb for ongoing action (like English -ing form), by ???? (yu, ) after the verb, or by both. For example:

• ???????????? (khao kamlang wing, ), or

• ??????????? (khao wing yu, ), or

• ???????????????? (khao kamlang wing yu, ), He is running.

Future can be indicated by ?? (cha, , will) before the verb or by a time expression indicating the future. For example:

• ????????? (khao cha wing, ), He will run or He is going to run

Past can be indicated by ??? (dai, ) before the verb or by a time expression indicating the past. However, ???? (laeo, :, already) is more often used to indicate the past tense by being placed behind the verb. Or, both ??? and ???? are put together to form the past tense expression, i.e. Subject + ??? + Verb + ????. For example:

• ????????? (khao dai kin, ), He ate

• ?????????? (khao kin laeo, , He (already) ate or He's already eaten

• ????????????? (khao dai kin laeo, ), He (already) ate or He's already eaten

Nouns and pronouns

Nouns are uninflected and have no gender; there are no articles.

Nouns are neither singular nor plural. Some specific nouns are reduplicated to form collectives: ???? (dek, child) is often repeated as ????? (dek dek) to refer to a group of children. The word ??? (phuak, ) may be used as a prefix of a noun or pronoun as a collective to pluralize or emphasise the following word. (?????, phuak phom, , we, masculine; ?????? phuak rao, , emphasised we; ?????? phuak ma, (the) dogs) Plurals are expressed by adding classifiers, used as measure words (????????), in the form of noun-number-classifier (????????, "teacher five person" for "five teachers"). While in English, such classifiers are usually absent ("four chairs") or optional ("two bottles of beer" or "two beers"), a classifier is almost always used in Thai (hence "chair four item" and "beer two bottle").

Subject pronouns are often omitted, while nicknames are often used where English would use a pronoun. There are specialised pronouns in the royal and sacred Thai languages. The following are appropriate for conversational use:

Particles

The particles are often untranslatable words added to the end of a sentence to indicate respect, a request, encouragement or other moods (similar to the use of intonation in English), as well as varying the level of formality. They are not used in elegant (written) Thai. The most common particles indicating respect are ???? (khrap, , with a high tone) for a man, and ??? (kha, , with a falling tone) for a woman; these can also be used to indicate an affirmative.

Other common particles are:

Phonology

Tones

There are five phonemic tones: middle, low, high, rising and falling. The table shows an example of both the phonemic tones and their phonetic realization, in the IPA.

Consonants

Thai distinguishes among three voice/aspiration patterns for plosive consonants:

• unvoiced, unaspirated
• unvoiced, aspirated
• voiced, unaspirated

Where English has only a distinction between the voiced, unaspirated and the unvoiced, aspirated , Thai distinguishes a third sound which is neither voiced nor aspirated, which occurs in English only as an allophone of , approximately the sound of the p in "spin." There is similarly an alveolar , , triplet. In the velar series there is a , pair and in the postalveolar series the , pair.

In each cell below, the first line indicates International Phonetic Alphabet (IPA), the second indicates the Thai characters in initial position (more letters appearing in the same box have identical pronunciation).

^* ? can be pronounced as or depended on Thai words.

^** The glottal plosive is implied after a short vowel without final, or the silent ? before a vowel.

Vowels

The basic vowels of the Thai language, 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.

Monophthongs of Thai. From

The vowels each exist in long-short pairs: these are distinct phonemes forming unrelated words in Thai,^[1] but usually transliterated the same: ??? (khao) means he or she, while ??? (khao) means white.

The long-short pairs are as follows:

Diphthongs of Thai. From

Additionally, there are three triphthongs, all of which are long:

For a guide to written vowels, see the Thai alphabet page.

Vocabulary

Other than compound words and words of foreign origin, most words are monosyllabic. Historically, words have most often been borrowed from Sanskrit and P?li; Buddhist terminology is particularly indebted to these. Old Khmer has also contributed its share, especially in regard to royal court terminology. Since the beginning of the 20th century, however, the English language has had the greatest influence. Many Teochew Chinese words are also used, some replacing existing Thai words.

Thailand also uses the distinctive Thai six hour clock in addition to the 24 hour clock.

References

Bibliography

• Higbie, James and Thinsan, Snea. Thai Reference Grammar: The Structure of Spoken Thai. Bangkok: Orchid Press, 2003. ISBN 974-8304-96-5.
• Nanthana Ronnakiat, Dr. (?????? ?????????, ??.) Phonetics in Principle and Practical. (??????????????????????????????) Bangkok: Thammasat University, 2005. ISBN 974-571-929-3.
• Segaller, Denis. Thai Without Tears: A Guide to Simple Thai Speaking. Bangkok: BMD Book Mags, 1999. ISBN 974-87115-2-8.
• Smyth, David. Thai: An Essential Grammar. London: Routledge, 2002. ISBN 0-415-22614-7.

See also

• Thai numerals

External links

• Thai phrasebook in wikitravel
• Ethnologue write-up on Thai
• Thai-language.com Dictionary, forums, and reference material
• Thai2english.com Also gives sound-alike words with different tones
• Slice-of-Thai.com: Consonant/vowel flashcards + detailed pages on Thai tone/vowel/consonant sounds, with spectrogram program to visualize your own voice
• IPA and SAMPA for Thai
• Websters Thai-English Dictionary
• Thai Particles (Large list of Thai particles with explanations and example sentences).
• Online Keyboard for Thai
• Free Thai Audiolearning Course (Free English - Thai audiofiles with translations of words and phrases to several different topics)
• Spacing in written Thai
• Thai phrasebook for Smartphones
• Volubilis Dictionary (Free multilingual Thai dictionary : Thai - Romanized Thai - English - French ~ 26,000 entries)

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