As I understand it and I could be wrong. Albino is from Latin and means “white” so has been used for Albino humans, etc. It’s usually applied to most animals that lacking melanin would be white but doesn’t really take into account multiple different pigments and the genetics involved, it’s just a white animal or human. Amelanism is a way more precise term denoting the exact pigment that is turned off. Technically, there are a ton of, say corn snake morphs, for example, that would all qualify for the term Albino but there are many different genes involved, which is why it’s not a term generally used nowadays.
While I will follow the generally used terms in different species, I do appreciate the corn snake market where a bigger push is made to be precise than some other species.