1 Duke - the head of a duchy; in the UK, dukes are the most senior nobles. 2  Marquess. 3  Earl. Outside of the English-speaking world, the title is referred to as Count. 4  Viscount. 5  Baron - the most junior of noble titles.
Ethnic Khmer living in Thailand, in Vietnam, and in Laos speak dialects of Khmer that are more or less intelligible to Khmer speakers from Cambodia. Minority languages include Vietnamese, Cham, several dialects of Chinese, and the languages of the various hill tribes.
Khmer in Vietnam. The Khmer language, also called Cambodian, is a Mon-Khmer language spoken by most of the population of Cambodia, where it is the official language, and by some 1.3 million people in southeastern Thailand, and also by more than a million people in southern Vietnam.