About Thai Language
According to Wikipedia.org, Thai, also known as Central Thai is a Tai language of the Kra–Dai language family. It is spoken by the Central Thai people. A vast majority of Thai Chinese also speak Thai. It is the official language of Thailand. Thai is one of the most spoken languages. There are over 60 languages of Thailand but Thai is one of the most popular languages in Thailand. It is spoken by both native and overall speakers. Half of the Thai vocabulary is similar to Pali, Sanskrit, Mon, and Old Khmer. It is the analytic language and is very much similar to the Chinese and Vietnamese languages. Thai is a dominant language and is spoken by the majority of the society in Thailand. Thai language gained widespread popularity in Thailand and other parts of the world. The language is also adopted as the second language in the late 18th century. Ethnic minorities speak Thai other than their native language or dialect.
About Sinhala Language
According to Wikipedia.org, Sinhala is an Indo-Aryan language. It is primarily spoken by the Sinhalese people. The language is spoken in Sri Lanka. The Sinhala speakers form the largest ethnic group on the island. It is spoken by around 16 million. Sinhala is the first language by other people in Sri Lanka. The Sinhala script is one of the Brahmic scripts and is closely related to the Kadamba script. Sinhala is the official language of Sri Lanka. The language has played a major role in the development of Theravada Buddhist literature. Sinhala has the closest relatives in the form of the Vedda language. It is spoken by a minority of Sri Lankans. Sinhala origin comes from the Old Sinhala and has borrowed various aspects into the Indo-Aryan substrate. It is also similar to the Maldivian language.