What are the conditions for Spanish naturalization?

I don't think so. It seems that naturalization requires an assessment of residence time and language, but it should not be too harsh. After all, the Spanish Immigration Bureau should not create trouble for immigrants, otherwise I don't think there will be so many immigrants every year. You should just show the Immigration Bureau the sincerity of immigrants, or you can ask the immigration company. I'm sure they'll know what's going on Zhaolong immigrated to Europe quite early. You should ask clearly before making a decision.