I don't speak Spanish, how do I handle that in a job interview?

I have a job interview this week at a retail store. I live in a city with a high population of Spanish speakers with many who only speak Spanish. I have worked retail here before and it was definitely a hindrance. That employer never asked if i spoke Spanish however, assuming I did since I’m Hispanic.

I’m concerned this employer will ask however. If they do ask, how can I respond in a way that makes it seem like less of a handicap?