Kra–Dai languages in the context of "Languages of Asia"

The classification of the Japonic languages and their external relations is unclear. Linguists traditionally consider the Japonic languages to belong to an independent family; indeed, until the classification of Ryukyuan and eventually Hachijō as separate languages within a Japonic family rather than as dialects of Japanese, Japanese was considered a language isolate.

Among more distant connections, the possibility of a genetic relationship to languages like Austronesian and or Kra–Dai, are discussed. A relation between Japonic and Koreanic is also considered plausible by some linguists, while others reject this idea. Independent of the question of a Japonic–Koreanic connection, both the Japonic and Koreanic languages are sometimes included in the now largely discredited Altaic family.

The Tai languages (/ˈtaɪ/ TIE), also known as Zhuang–Tai and Daic languages (/ˈdaɪ.ɪk/ DYE-ik), are a branch of the Kra–Dai language family. The Tai languages include the most widely spoken of the Tai–Kadai languages, including Standard Thai or Siamese, the national language of Thailand; Lao or Laotian, the national language of Laos; Myanmar's Shan language; and Zhuang, a major language in the Southwestern China's Guangxi Zhuang Autonomous Region, spoken by the Zhuang people (壯), the largest minority ethnic group in China, with a population of 15.55 million, living mainly in Guangxi, the rest scattered across Yunnan, Guangdong, Guizhou, and Hunan provinces.

Languages of India belong to several language families, the major ones being the Indo-Aryan languages spoken by 78.05% of Indians and the Dravidian languages spoken by 19.64% of Indians; both families together are sometimes known as Indic languages. Languages spoken by the remaining 2.31% of the population belong to the Austroasiatic, Sino–Tibetan, Tai–Kadai, Andamanese, and a few other minor language families and isolates. According to the People's Linguistic Survey of India, India has the second highest number of languages (780), after Papua New Guinea (840). Ethnologue lists a lower number of 456.

Article 343 of the Constitution of India stated that the official language of the Union is Hindi in Devanagari script, with official use of English to continue for 15 years. Opposition to increased Hindi usage in South India led to the passage of the Official Languages Act in 1963, amending the constitution to allow for the continuation of English alongside Hindi in the Indian government indefinitely. The form of numerals to be used for the official purposes of the Union are "the international form of Indian numerals", which are referred to as Arabic numerals in most English-speaking countries. Despite some misconceptions, Hindi is not the national language of India; the Constitution of India does not give any language the status of national language.

Thai, or Central Thai (historically Siamese; Thai: ภาษาไทย), is a Tai language of the Kra–Dai language family spoken by the Central Thai, Mon, Lao Wiang, and Phuan people in Central Thailand and the vast majority of Thai Chinese enclaves throughout the country. It is the sole official language of Thailand.

Thai is the most spoken of over 60 languages of Thailand by both number of native and overall speakers. Over half of its vocabulary is derived from or borrowed from Pali, Sanskrit, Mon and Old Khmer. It is a tonal and analytic language. Thai has a complex orthography and system of relational markers. Spoken Thai, depending on standard sociolinguistic factors such as age, gender, class, spatial proximity, and the urban/rural divide, is partly mutually intelligible with Lao, Isan, and some fellow Thai topolects. These languages are written with slightly different scripts, but are linguistically similar and effectively form a dialect continuum.

The Bouyei language (autonym: Haausqyaix, also spelled Buyi, Buyei or Puyi; Chinese: 布依语; pinyin: Bùyīyǔ; Vietnamese: tiếng Bố Y or tiếng Giáy) is a language spoken by the Bouyei ethnic group of Southern Guizhou Province, China. Classified as a member of the Northern Tai group in the Tai language branch of the Tai–Kadai language family, the language has over 2.5 million native speakers and is also used by the Giay people (Vietnamese: Giáy) in some parts of Vietnam. There are native speakers living in France and the United States as well, who emigrated from China or Vietnam. About 98% of the native speakers are in China.

Bouyei's characteristics are similar to the other members of its language branch. It is generally monosyllabic and word order and particles are the main forms of grammar. Bouyei's syllable initials match up closely to the other Northern Tai languages, with relatively fast simplification and merging. Bouyei sentences can be shown to contain many different levels of phrasing.

Thai people, historically known as Siamese people, are an ethnic group native to Thailand. In a narrower and ethnic sense, the Thais are also a Tai ethnic group dominant in Central and Southern Thailand (Siam proper). Part of the larger Tai ethno-linguistic group native to Southeast Asia as well as Southern China, Thais speak the Sukhothai languages (Central Thai and Southern Thai language), which is classified as part of the Kra–Dai family of languages. The majority of Thais are followers of Theravada Buddhism.

Government policies during the late 1930s and early 1940s resulted in the successful forced assimilation of various ethno-linguistic groups into the country's dominant Central Thai language and culture, leading to the term Thai people to come to refer to the population of Thailand overall. This includes other subgroups of the Tai ethno-linguistic group, such as the Northern Thais and the Isan people, as well as non-Southeast Asian and non-Tai groups, the largest of which is that of the Han Chinese, who form a substantial minority ethnic group in Thailand.

Sino-Xenic vocabularies are large-scale and systematic borrowings of the Chinese lexicon into the Japanese, Korean and Vietnamese languages, none of which are genetically related to Chinese. The resulting Sino-Japanese, Sino-Korean and Sino-Vietnamese vocabularies now make up a large part of the lexicons of these languages. The pronunciation systems for these vocabularies originated from conscious attempts to consistently approximate the original Chinese sounds while reading Classical Chinese. They are used alongside modern varieties of Chinese in historical Chinese phonology, particularly the reconstruction of the sounds of Middle Chinese. Some other languages, such as Hmong–Mien and Kra–Dai languages, also contain large numbers of Chinese loanwords but without the systematic correspondences that characterize Sino-Xenic vocabularies.

The term was coined in 1953 by the linguist Samuel E. Martin from the Greek ξένος (xénos, 'foreign'); Martin called these borrowings "Sino-Xenic dialects".