I'm not against it being made the official language but at the same time I am not for making it a requirement either. I don't deny being able to communicate is very important especially when one's culture is different but not everyone have the opportunity to learn a new language in their home country prior to immigrating anywhere.
Some measures are already kinda in-place to encourage/force people to learn the language whether it be for a job or to get certified in something. Hell, some folks immigrating over might be on par, if not better, with some skills than the people already living here. The only barrier would be the language.
On a completely different side note, I found it interesting and a little funny that the official language(s) in Firefly was English and Mandarin. Somehow the developers those those as the two most prominent languages.
"You must gather your party before venturing forth"
"Go for the eyes Boo! Go for the eyes!"