I am bilingual. I speak English and Spanish. However, I have lots of Chicano friends who speak English, but do not speak Spanish. These persons are monolingual. Yet, many of my monolingual friends choose to mix in words in Spanish. Linguists have documented this as a dialect of English known as Chicano English. Originally people thought that Chicano English wasn’t even a separate dialect of English, that it was just the way that people spoke when their first language was Spanish (“making mistakes”, and with an “accent”). But while Chicano English is influenced by Spanish in a general way, we now know that it is its own separate dialect, not just a “Spanish accent” because there are monolingual English speakers who don’t know any Spanish, and yet still speak Chicano English. Chicano English is what I heard growing up in Highland Park, California. Take the Chicano English quiz here.