The Wikipedia page is informative. Spanish and Portuguese chorizo is made with chopped pork and smoke paprika, and can be hot or sweet, depending on the paprika. Mexican chorizo is made with a native pepper and ground pork. Other places make it differently, so the point of origin is important.I eventually looked up what the word meant, simply that it featured paprika.
If looking for Spanish chorizo, try Puerto Rican, which is supposedly similar.