> English is the national language of the US, when where's no such thing as a national language in the US

"This is America, Speak English!" does have legal might behind it because of 8 USC 1423[1]

The new DREAM act which went through the house of reps specifically calls out an exemption from that.

[1] - http://uscode.house.gov/view.xhtml?req=(title:8%20section:14...