I see a Vietnamese flag hanging on the left, which strongly indicates I am in Vietnam. The text on the sign says "Lẩu Thái Tom-Yum," which confirms the language is Vietnamese. The street scene with small street-side food stalls and motorbikes is very characteristic of urban Vietnam. I suspect this is in a tourist-heavy area of Hanoi or Ho Chi Minh City. I am fairly confident this is Vietnam.

then: guess