This is a for real thing that happens, as a Hispanic who can't speak a lick of Spanish, I turn around with a "dude say something Swedish/German/welsh" retort.
Yea I have two coworkers who are Hispanic. One speak fluent Spanish and familiar with nuances and dialects. The other one speak very little Spanish.. so they speak in Spanish when they gossip, but because one of them isn't fluent it's kind of hilarious
.... also, one of them cheats on her taxes and hates her boss. They aren't the only ones who know Spanish.
.... also, one of them cheats on her taxes and hates her boss. They aren't the only ones who know Spanish.