This might teach them a little bit about languages, at least. If it’s a Spanish class exercise, that’s fine, and maybe they’ll learn something that will be generally applicable. We are not even teaching native English speakers in their English classes about English grammar. Way too busy with “gay rights.”
Most Hispanics speak an abysmal Spanish (called “de la abuela,” grandmother Spanish, in other words, the few words any immigrant has always need to communicate with his non-English speaking grandparents, mostly nouns and a few phrases like ‘I love you, Granny,’ in the respective language).
If this involves English speakers as well, it could actually teach them something about grammatical structure and the nuts and bolts of a language.
Spanglish and other mangled Romance languages are frowned upon by purists. Who wants to speak a bastardized language?