True, but there are many who speak Spanish and English and many that speak only Spanish. Not just illegals but legal immigrants and American citizens as well. In fact, Spanish is the official language of Puerto Rico. Spanish has been spoken here for decades, and Univision has been around quite a while too. Not a problem, let alone the end of the world.
If one is here as a citizen legally then why are they here if they don't want to adapt to what the language of our nation is?
It's not rocket science.