Seems plausible. Thailand borders the Confucian Sinocentric cultural complex but it was never part of it. The writing system was always based off of an Indian,

Seems plausible. Thailand borders the Confucian Sinocentric cultural complex but it was never part of it. The writing system was always based off of an Indian, Sanskrit base and the religion is the kind of heavily Hindu influenced Buddhism that prevailed across the North of the subcontinent up until the Muslim invasions.