Thai (ภาษาไทย Phasa Thai [pʰāːsǎːtʰāj] ( listen)) is the naitional an offeecial leid o Thailand an the native leid o the Thai fowk, Thailand's dominant ethnic group. Thai is a member o the Tai group o the Tai-Kadai leid family. Historical linguists hae been unable tae definitively link the Tai-Kadai leids tae ony ither leid family. Some wirds in Thai are borrowed frae Pali, Sanskrit an Auld Khmer. It is a tonal an analytic leid. Thai an aa haes a complex orthography an relational markers. Thai is mutually intelligible wi Lao.