A bilingual joke

A man goes into a department store. He cannot speak English. He only speaks Spanish. The clerk says, "May I help you?" The man says, "Quiero un par de calcetines." (I want a pair of socks.) The clerk says, "I don't understand Spanish. Do you want some pants?" And he holds up a pair of pants. The man says, "No, pantalones no! Quiero calcetines." (No, not pants! I want socks.) The clerk then holds up a shirt and asks, "Do you want a shirt?" "No, camisa no." (No, not a shirt.) says the man, "Quiero calcetines." Patiently the clerk hold up a pair of shoes, "How about some shoes?" he asks. "No, zapatos no." (No, not shoes.) Finally the clerk holds up a pair of socks and the man says, "Eso si que es!" (That is it!) and the clerk says, "Why didn't you tell me you could spell?"