Thai 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. Standard Thai, also known as Central Thai or Siamese, is the official language of Thailand, spoken by about 65 million people including speakers of Bangkok Thai . 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. 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 : informal, without polite terms of address, as used between close relatives and friends. * Elegant 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.

The German language is a West Germanic language and one of the world's major languages. German is closely related to and classified alongside English and Dutch. Around the world, German is spoken by ~100 million native speakers and also ~80 million non-native speakers, and Standard German is widely taught in schools and universities in Europe. Worldwide, German accounts for the most written translations into and from a language In German linguistics, only the traditional regional varieties are called dialects, not the different varieties of standard German. Standard German has originated not as a traditional dialect of a specific region, but as a written language. However, there are places where the traditional regional dialects have been replaced by standard German; this is the case in vast stretches of Northern Germany, but also in major cities in other parts of the country. Standard German differs regionally, especially between German-speaking countries, especially in vocabulary, but also in some instances of pronunciation and even grammar and orthography. This variation must not be confused with the variation of local dialects. Even though the regional varieties of standard German are only to a certain degree influenced by the local dialects, they are very distinct. German is thus considered a pluricentric language. In most regions, the speakers use a continuum of mixtures from more dialectical varieties to more standard varieties according to situation. In the German-speaking parts of Switzerland, mixtures of dialect and standard are very seldom used, and the use of standard German is largely restricted to the written language. Therefore, this situation has been called a medial diglossia. Swiss Standard German is only spoken with people who do not understand the Swiss German dialects at all. It is expected to be used in school.