The official language of Thailand is Thai, which is closely related to Lao and languages in nearby countries. The most important person is King Rama IX, as Thailand is a monarchy. Some cultural traditions include the Rocket Festival celebrated by Lao ethnic groups and the Ghost Festival in Isan province. Thai culture is also expressed through foods like tom yum soup, green curry, and pad thai as well as arts such as wood carving, masks, and paintings. Buddhism is the dominant religion, along with Chinese folk religions and Tai folk religions. The government aims to preserve Thai national culture and identity.