Unless you are otherwise deficient in science or social studies, it does not seem like stopping Spanish at level 3 to make room for AP biology or psychology makes sense. Even if you are otherwise deficient in one of those subjects, it is more of a “which deficiency is less bad?” in the context of the rest of your record and goals. And if that is the case, there could be some other less essential course that you could drop to prevent both deficiencies.
CS after AP CS A or AP seminar would be electives of lower priority than making sure that you do not have any subject deficiency relative to that expected or desired by the colleges you are aiming for.