Tsat, also known as Utsat, Utset, Hainan Cham, or Huihui (p=Huíhuīyǔ), is an Austronesian language spoken by 4,500 Utsul people in the Huihui and Huixin villages near the city of Sanya in Hainan, China.
Hainan Cham offers an extreme example of change through language contact. Its phonology, word structure, and grammar have all been extensively influenced by neighbouring Hlai languages and Sinitic languages, making it a member of the Mainland Southeast Asian linguistic area in contrast to other Austronesian languages.
The origins of the Utsul are obscure. Though they are undoubtedly Cham, and therefore primarily descended from immigrants from the Champa of modern-day southern Vietnam, it is unclear when they arrived in Hainan and to what extent other Hui people Muslim groups contributed to their ethnogenesis. Thurgood, Thurgood, and Li (2014) record several traditional accounts, which mention Tang dynasty-dynasty Xinjiang, Song dynasty Guangdong, and post-Vijaya Champa as distinct legendary origins of the Utsul people. These accounts - all of which are considered to have some basis in historical fact - reveal a strong emphasis on Muslim religious identity rather than ethnolinguistic heritage, compounded by the conflation of Muslims in the region as "Hui" regardless of language. A migration from Champa after 968 AD (the fall of Indrapura) appear to be the most significant contributor to the modern Utsul identity, although another migration in the fifteenth century is also recorded in Chinese texts.
Thurgood, Thurgood, and Li's grammar distinguishes between an older form of the language, "Colloquial Cham", and a more recent "Mandarinised" version. Their source for the former is Li and Thompson's 1981 research among speakers since deceased; it is doubtful whether the less Mandarinised variety is still spoken in Sanya.
| + !Process !Non-HC Austronesian !HC !Meaning | |||
| Loss of medial /-h-/ | tahun (Malay) | thun³³ | year |
| Diphthongisation of /-r-, -l-/ | *bulan (Proto-Chamic) | pʰian²¹ | moon |
| Initial syllable deletion | *basah (Proto-Chamic) | sa⁵⁵ | damp |
| +Hainan Cham Tonogenesis !c=01 | Tone value (Hainan Cham) !c=02 | Type of tone (Hainan Cham) !c=03 | Proto-Chamic final sound |
| 55 | High | *-h, *-s; PAN *-q | |
| 42 | Falling | *-p, *-t, *-k, *-c, *-ʔ Voiceless final: voiced stop / affricate (pre-)initial *-ay, *-an | |
| 24 | Rising | *-p, *-t, *-k, *-c, *-ʔ Voiceless final: default | |
| 11 | Low | Vowels and nasals, *-a:s Voiced final: voiced stop / affricate (pre-)initial | |
| 33 | Mid | Vowels and nasals, *a:s Voiced final: default |
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