I'm better at speaking Vietnamese in the morning. This morning I went to buy a small shoulder bag to carry around my wallet and notebook and dictionary. I already knew the street where such things are sold so I headed over there and began looking around. One of the shops seemed to have several bags that might do, so I went in and, speaking Vietnamese, asked for a shoulder bag, a small one. For five minutes or so I looked at various bags, asking for different colors and sizes, then negotiating the price (The owner knocked a dollar off! I'm such a tough negotiator.) I did the whole thing completely in vietnamese. Must have been the shot of espresso I had after breakfast. This afternoon, on the other hand, wrung out from the heat, I couldn't even manage to order a Mango smoothie in the language. I really should stay ot of places that cater to tourists, where the staff (rightly) wants to help me by speaking my language. I have the best experiences when buying from the street, where people's English is minimal to non-existant. Anyway, I certainly was not fluent this morning, but I conducted an extended transaction -- a stylized conversation -- completely in Vietnamese.