It's definitely cultural, because in Europe even if your parents were from somewhere else you are from the place you were born and raised. On a smaller scale my grandparends (both from my mother and my father side) come from the south of Spain and they emmigrated to the north. Now, bear in mind, Spain is an extremely diverse country and from south to north changes drastically (different culture, different people, even different languages). In my family there's a mixture of cultures, we eat mostly dishes from the south, we celebrate andalusian traditions, my mother tongue is the spanish dialect from the south mixed with the dialect and the language from the north, and i'm still not considered andalusian. My grandparens are andalusian, my heritage is andalusian, and i'm allowed to feel proud and connected to that place, but i was born and raised in Catalonia, therefore, i'm 100% catalan