In modern society, private law situations with an international element are common, which situations need to be regulated by law, given that they cause a conflict of laws and a conflict of jurisdictions. Regulations of private international law solve the conflict of laws by giving us an answer to the question of which state's law will be applicable for certain private law situation with an international element, that is, which state's law will be applied in such a specific situation. Determining the applicable law for a specific private law situation is done using connecting factors. The most well-known and common connecting factors that are applied in private international law are the connecting factor of nationality, connecting factor of domicile and the connecting factor of habitual residence, but these connecting factors are not the only factors that apply. It should be emphasized that the connecting factor of habitual residence has largely replaced the connecting factor of nationality and the connecting factor of domicile in private international law, but it has not completely displaced the said connecting factors from use. The connecting factor of nationality is still primarily applied in the institutes of inheritance law, in the institutes of personal status of the individual as well as in numerous institutes of family law. In this paper, special emphasis will be placed on the use of the connecting factor of nationality to determine the applicable law in institutes of inheritance law, in the institutes of personal status of the individual as well as in the institutes of family law, and the above will be elaborated in more detail, considering the legal changes in the determination of the applicable law in the said legal institutes.