 The society is known for its role in the planning and regulation of the Thai language, as well as its many publications, particularly the "Royal Institute Dictionary", the official and prescriptive dictionary of the Thai language, and the Royal Thai General System of Transcription (RTGS), the official system for romanising Thai words.The budget allocated to the Royal Society for FY2019 is 192.2 million baht.On 19 April 1926, the Royal Society of Siam was established by King Prajadhipok.