Would this mean that Spanish would be a requirement for all students in school?

It's funny that you say that, because in the State of Florida we've actually had a poll that asked if Spanish should be required to learn in school. In that poll around 60 to 65% supported the idea. Making Spanish one of the official languages was not a part of this poll.

Now, as for your concern regarding other people wanting their language as one of the official languages, I do see that happening, however, there won't be that much support for other language groups whether European or indigenous American. Spanish is spoken between 20 to 25% (likely higher) of the Floridian populace, while languages such as French and Portuguese are less than 10% together.

Thanks for your comments; I'll definitely consider including it in my article.