The article is about constitutional legal guarantees of the Croatian language in the countries of the Republic of Montenegro, Republic of Kosovo, Republic of Macedonia and Republic of Serbia. There is a diverse Croatian minority in each of these countries. However, the right to language, and in particular the right of the Croatian national minority, is not universally guaranteed everywhere. Analyzing the basic laws - the laws of the Republic of Montenegro, the Republic of Kosovo, the Republic of Macedonia and the Republic of Serbia, it seems that the Montenegrin state provides the most complete guarantee regarding the Croatian language as a minority language. The fact that the Croatian language is listed as one of the official languages in this republic is an expression of the desire to underline the indigenous people living in this republic.