Medical schools are concerned with your background in biology, chemistry. and biochemistry. Your foreign language skills are essentially irrelevant to them, which is why they are not tested on the MCAT. That said, a person who has learned an extremely difficuklt language such as Chinese or Arabic, has shown that they have persistence and, probably, great study habits and intelligence, all traits that will help you get through medical school.

In short, I would say Spanish is always useful for medical professionals, but it depends where you want to work. Keep in mind for work purposes that a language is useful only when you speak it well enough to work in that language, which usually takes a lot of study, and perhaps work, in an environment where the language is spoken. Perhaps that can be accomplished during a residency.

Good luck…

in those areas you must use it more often.