"they must agree to make English the official language of PR."
Language hasn't been a problem for the last 107 years. Heck, I'm in and from Puerto Rico and I am writing to you in English! In fact, English is ALREADY one of Puerto Rico's two official languages, the other being Spanish.
I would be interested in knowing which states have English as their official language. Official as in codified into law. I'll grant that English is one of the things that bond our nation together, but you just can't move the goal post just for us.