Common
Royal Thai General System of Transcription
Official Thai romanization system
Royal Thai General System of Transcription
The Royal Thai General System of Transcription (RTGS; Thai: หลักเกณฑ์การถอดอักษรไทยเป็นอักษรโรมันแบบถ่ายเสียงของราชบัณฑิตยสถาน) is the official system for rendering Thai words in the Latin script. It was published by the Royal Institute of Thailand in early 1917, when Thailand was called Siam. It is used in road signs and government publications and is the closest method to a standard of transcription for Thai, but its use, even by the government, is inconsistent. The system is almost identical to the one that is defined by ISO 11940-2.
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