This is a tough one because I personally believe both math and languages are areas where maintaining continuity is really helpful.
So I normally don’t bother to recommend this sort of thing, but could you take BC and then self-study Spanish? Like I don’t know if you actually need to take the AP test–that would depend on whether you wanted a chance at credit. But I would personally think it a good idea to keep studying Spanish just to keep improving your Spanish, setting up going even farther in college.