I tried once to compliment a friend on her car and told her in perfect Spanish, "Me gusta su coche." She asked me to repeat myself a few times and with gesturing I was able to get the point across. But she still looked at me like I was crazy. What I didn’t know was that "Me gusta su coche" means "I like your cart" in Costa Rica, not "I like your car." I had just insulted her by comparing her car to a grocery cart.