I have to tell my favorite bilingual joke, which depends on saying letters as words.
A Mexican guy who speaks no English but wants to buy socks goes into a clothing store.
He says to the clerk, “Quiero calcetines.” (“I want socks.”)
The clerk says “I don’t understand Spanish. Do you want to buy pants?”
The Mexican says, “No quiero pantalones. Quiero calcetines.”
The clerk then offers him shirts. He replies, “No quiero camisetas. Quiero calcetines.”
The clerk keeps offering him different items, only to have them rejected.
Finally he shows him socks. The Mexican says, “Eso si que es!” (“Yes, that’s it!”), pronounced ess-oh-see-kay-ess (SOCKS).
The clerk says in exasperation, “If you could spell it, why didn’t you tell me that when you came in!”