LINK:

https://renaissance-translations.com/thai-language-history/

The Tai language in itself is a branch of the Kra-Dai language family. It branches out to languages such as Northern Tai, Central Tai, and Southwestern Tai. 

There are different language groups within each branch of the Kra-Dai language. For example, in Northern Tai, languages that are seen to be similar to each other are 'SaekOG' and 'SaekYG'.' And in Southwestern Tai, there's the 'LueChiengHung' and the 'LueMuongYong.'

One example of a toponym found in Thailand is Bangkok. Bangkok is known as Thailand's capital and is a name commonly used by foreigners. The origin of the name is unclear, however, but Bang is a word that means 'a village on stream' in the Thai language. Furthermore, the name Bangkok could have been derived from the name Bang Ko, which means 'island' in the Thai language and it could've been due to the city's water landscape. 

The official langage of Thailand is Central Thai, or known as Siamese. It's a native language in the Central, Eastern, and Southwestern Thailand. It is the sole language in education and government and is spoken all throughout the country. 

The different religions that make up Thailand is Buddhism, Islam, Christianity, and Hinduism. Statistically, 92.5 percent of people are Buddhists in Thailand, 5.4 percent are Muslim, and 1.2 percent are Christian. 

Regarding Buddhism, the main religion, it was diffused to Thailand from the influence of Emperor Ashoka when he sent Buddhist missionaries to Thailand in the 3rd century B.C. By the 6th century A.D., the religion became well established in south and central areas of Thailand.