This happens at least twice a week - I'll be in line at my work's cafeteria and someone will try to have a conversation with the cashier in "Spanish"
A rough example from this morning:
Lady buying some gross breakfast sandwich: "Buenas deeyas"
Cashier lady: "Hi, haven't seen you around in a while"
Lady: "I've been busy with my trabahjo since June, how do you say "June"?
Cashier: "Junio"
Lady: "Juneau"