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 Tajik Language
According to Wikipedia.org, Tajik is a form of Persian that is spoken in Tajikistan, Uzbekistan, Kyrgyzstan, Kyrgyzstan, China, and Kazakhstan. The total number of Tajik speakers is 8 million that including 6.3 million in Tajikistan itself. You will be surprised to know that the Persian language in Tajikistan was renamed Tajik by Stalin in 1932. This was done to differentiate Persian speakers in Iran and Central Asia. Before 1928 Tajik was written in Perso-Arabic script. However, from 1928 to 1940 it was modified with the Cyrillic alphabet. There were a lot of people who wanted to switch it to the Latin alphabet. The Tajik dialects are separated into northern, central, southern, and Southeastern dialects. Most of the politicians and other officials usually make their speeches in the Kulob dialect. There is a total of six vowels in this language.