The term 'Neighbor of a Vietnamese' can be answered with two crossword solutions: LAOTIAN (7 letters) and Lao (3 letters). LAOTIAN is an adjective used to describe something or someone from Laos, a landlocked country in Southeast Asia. Laos is bordered by Vietnam to the east, Cambodia to the south, Thailand to the west, and Myanmar and China to the north. Lao is the official language of Laos, which is closely related to Thai and is spoken by the majority of the population.