The core Thai--the Central Thai, the Northeastern Thai (Thai-Lao), the Northern Thai, and the Southern Thai--spoke dialects of one of the languages of the Tai language family. The peoples who spoke those languages--generically also referred to as Tai--originated in southern China, but they were dispersed throughout mainland Southeast Asia from Burma to Vietnam. It was conventional in the 1980s to refer to Tai-speaking peoples in Thailand as Thai (same pronunciation) with a regional or other qualifier, e.g., Central Thai. There were, however, groups in Thailand in the late twentieth century who spoke a language of the Tai family but who were not part of the core population.

Although the four major Tai-speaking groups taken together clearly constituted the overwhelming majority of Thailand's population, it was not entirely clear what proportion of the core Thai fell into each of the regional categories. Among the reasons for the uncertainty were the movements of many who were not Central Thai in origin into the Bangkok area and its environs and the movement of Central Thai, perhaps in smaller numbers, into other regions as administrators, educators, technicians, bureaucrats, soldiers, and sometimes as settlers. The Central Thai, of generally higher status than the general populace, tended to retain their identities wherever they lived, whereas those from other regions migrating to the central plain might seek to take on Central Thai speech, customs, and identity.

Although politically, socially, and culturally dominant, the Central Thai did not constitute a majority of the population and barely exceeded the Thai-Lao in numbers, according to a mid-1960s estimate. At that time, the Central Thai made up roughly 32 percent of the population, with the Thai-Lao a close second at about 30 percent. The Thai-Lao were essentially the same ethnic group that constituted the dominant population of Laos, although they far outnumbered the population of that country.

A number of linguistic scholars mark the reign of King Narai (1657-88) as the point when the Central Thai (or Ayutthaya Thai) dialect was established as the standard to which other forms or dialects were compared. Central Thai was the required form used in modern Thailand for official, business, academic, and other daily transactions. From Ayutthayan times, Central Thai borrowed words from Khmer, Pali, and Sanskrit. Thailand still maintained a court language called Phasa Ratchasap, although King Bhumibol Adulyadej (Rama IX, 1946- ) encouraged the use of Central Thai. Similarly, Pali, the religious language, although still used, gradually was being replaced by Central Thai for many ceremonies and writings. Although the Thai Royal Academy was the final arbiter of new words added to the language, post-World War II Thai has been influenced heavily by American English, especially in the area of science and technology.

Increasingly, Central Thai was spoken with varied fluency all over the country as the education system reached larger numbers of children. Nevertheless, regional dialects (or their local variants) remained the language of the home and of the local community. Learning Central Thai is not a simple matter. The dialects of the four regional components of the core population are only mutually intelligible with difficulty. There are lexical and syntactic differences as well as differences in pronunciation.

Differences in dialect were sometimes an irritant in relations between those whose native tongue was Central Thai and persons from other regions. On the one hand, if persons migrating from other regions to Bangkok spoke their own dialect, they might be treated with contempt by the Central Thai. If, on the other hand, such persons failed to speak Central Thai with sufficient fluency and a proper accent, that, too, could lead to their being treated disrespectfully.

Generally, before the trend toward homogenization of dress, language, and forms of entertainment fostered by modern communication, there were regional differences in costume, folklore, and other aspects of culture among the Thai people. The continuing retention of these differences into the 1980s seemed to be a function of relative remoteness from Bangkok and other urban areas. Of some importance, according to observers, was the tendency to cling to, and even accentuate, these regional differences as symbols of a sense of grievance.

In the past, some Thai governments put great pressure on the various Thai peoples to forsake regional customs and dialects for "modern" Central Thai culture. In the 1980s, however, there was a rebirth of the study and teaching of local languages, especially Lanna Thai in the North and also the Southern Thai dialect. Efforts were also made to expose all Thai to the different cultures and traditions of the various regions through regional translation and art programs. At the same time, Central Thai became more readily accepted as a second language. The success of the national identity programs could be explained in part by the Thai literacy rate, one of the highest in Asia.

The Tai-speaking peoples of the Northeast, known as Thai-Lao or Isan, live on the Khorat Plateau. Once the weakest in Thailand, the Northeast's economy started to improve somewhat in the 1970s because of irrigation and energy projects, such as the construction of the Khuan Ubon Ratana (Nam Phong Dam). Moreover, because the Northeast was the location of several United States military bases during the Second Indochina War (1954-75), the region had one of the best transportation systems in Asia, which facilitated internal migration as well as communication with Bangkok. Historically, this area relied heavily on border trade with Laos and Cambodia; in 1987 the Thai government permitted increased Laotian border commerce and lifted a ban on the export of all but 61 of 273 "strategic" items previously barred from leaving Thailand. Also, traditional handicrafts, e.g., silk weavings and mats, increasingly were being sold outside the region to produce extra income. Still, approximately 82 percent of the region's labor force was involved in agriculture.

In terms of language and culture, both the Northeastern Thai and the Northern Thai were closer to the peoples of Laos than to the Central Thai. Speakers of the Tai language of Kham Mu'ang (known as Yuan in its written form) made up the majority of the population of the 9 northernmost provinces from the Burmese-Lao border down through the province of Uttaradit, an area of about 102,000 square kilometers. Highly independent, the Northern Thai lived mainly in small river valleys where they grew glutinous rice as their staple food. The Chakkri Dynasty continued to maintain a court in Chiang Mai, the largest city of the North, which the Thai people looked to as a major religious and cultural center.

The fourteen provinces of the South made up the poorest region of Thailand. Primarily rural, the South had an urban population of only 12.2 percent of its total inhabitants. Although rice was the staple food, the South's economy was not based on wet-rice agriculture. Never directly colonized, the southern provinces, with their dependence on rubber and tin production and fishing, had nonetheless long been vulnerable to international economic forces. As world market prices for rubber and tin declined in the 1970s, more southerners went to work in the Middle East; and as neighboring countries established 200-mile limits on their territorial waters, an increasing number of Thai fishing vessels could be found as far away as the coast of Australia.

In 1985 there were more than 6 million Southern Thai. Malay vocabulary was used in the Southern Thai dialect, and Malay in Jawi (Arabic) script remained in many instances the medium of written communication. Like the other regions of Thailand, the South at times opposed the central government. Following the closer incorporation of the Pattani region into the Thai kingdom as the result of the provincial administrative reform of 1902, reactions in the form of rebellions, underground movements, and violent uprisings were common. For many years, any type of antistate behavior or banditry reported by the government or press was usually attributed either to Muslim insurgents or the Communist Party of Thailand. By the mid-1980s, the press and government had become more objective in reporting and recognizing problems caused by environmental factors, other groups, and government policies. Moreover, the Muslim leadership, together with progressive political and military forces in the Thai government, had begun addressing some of the problems of the South, which led to increased national tranquillity.

Of the more than 85 percent of the country's population that spoke a language of the Tai family, only a small fraction constituted the membership of the half-dozen or so ethnic groups outside the core Thai. These groups lived in the North or Northeast and were often closely related to ethnic groups in neighboring countries. In Thailand, the largest of these Tai-speaking minorities were the Phutai (or Phuthai) of the far Northeast, who numbered about 100,000 in the mid-1960s. There were also many Phutai in neighboring Laos. The Phuan and the Saek, also in the Northeast and with kin in Laos, were similar but much smaller groups. Whereas all other Tai languages spoken in Thailand belonged to the southwestern branch of the family, that spoken by the Saek belonged to the northern branch, suggesting a more recent arrival from China. The Khorat Thai were not considered Central Thai, despite their close resemblance in language and dress, because they and others tended to identify them as a separate group. The Khorat Thai were said to be descendants of Thai soldiers and Khmer women. The Shan (a Burmese term) in the North were part of a much larger group, the majority of whom lived in Burma, while others lived in China. Different groups of the Shan called themselves by names in which the term Tai was modified by a word meaning "great" or something similar. The Thai called them Thai Ngio or Thai Yai. Also in the North were a people called the Lue, estimated in the mid-1960s to number less than 50,000. Like the Shan, they resided in greater numbers elsewhere, particularly in southern China.

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Source: U.S. Library of Congress