According to this story on Preply.com, El Paso is the most bilingual city in America:
The ability to speak more than one language can come in handy, and not just if you’re visiting a foreign country. It can be a valuable asset in the United States, as more than 1 in 5 Americans speak a language other than English at home.
. . .
El Paso, Texas is the most bilingual city in the country, followed by Los Angeles, California and San Jose, California.
Pero ya lo sabíamos.
Seguro que Hell yeah, we knew this!