the reaction of santorum is normal. One state must have 1 language.
If not, imagine you go to a county, for an adminisrative stuff, and the officer speak to you in bulgarian. Little problem, no ?
Porto Rico don't have to speak english, so porto rico have to be independant, as philippines were
two of more languages in a state is the assurance to have separatist parties on the political scene.
Yet we have several states where languages coexist.
and the risk of a possible mexican irredentism (or something like that)