Is it permissible for a Moroccan-born child in Spain to hold dual nationality, specifically both Moroccan and Spanish nationalities?

It is not permissible to reside in non-Muslim countries unless a Muslim is able to practice the rituals of his religion and is safe from temptation, or if he is compelled to do so. It is not permissible to seek citizenship of a disbelieving country for one's son due to the corrupting consequences that may result, such as their deviation or apostasy from the religion. Sheikh Abdullah bin Jibreen permitted obtaining disbelieving citizenship for one who is compelled, on the condition that he manifests his religion and is able to perform its rituals. However, it is not permissible to obtain it merely for a worldly benefit. The fundamental principle is that it is not permissible for a Muslim to voluntarily naturalize with the citizenship of a disbelieving country, but cases of necessity or need are considered individually. There is nothing in Islamic law that prevents dual nationality if it is with two Muslim countries or with a disbelieving country that permits naturalization with its citizenship, provided the conditions are met.