The national language of Tajikistan refers to the official language of Tajikistan and the most commonly used language in Tajikistan. The national language of Tajikistan is based on Persian, which is similar to Persian in Iran, Afghanistan and other countries. The national language of Tajikistan is written in Tajik alphabet, which is different from Cyrillic alphabet and Latin alphabet. This language is widely used in Tajikistan's big cities and surrounding areas, and it is also the official language in government, education, news and other fields.

In Tajikistan, besides the national language of Tajikistan, Russian is also widely used. From the mid-1960s to the early 1990s, the Soviet Union used Russian as its official language, which left a far-reaching influence in Tajikistan. Russian still plays an important role in Tajikistan's education, industry, transportation and other fields. In addition, there are other languages and dialects in Tajikistan, such as Uzbek and Kyrgyz.

With the development of Tajikistan's economy and society, more and more people begin to learn English and become the third major language. English has become a compulsory course for universities, research institutions, enterprises and hotels in Tajikistan. In addition, some young people are also keen to learn unofficial languages such as Korean and Chinese to meet the needs of employment and tourism. Generally speaking, with the acceleration of globalization, multilingual environment is becoming more and more common, and the national language of Tajikistan is becoming more and more important.