is of Khmer origin and speak the Khmer language , the country's official language. Cambodia's population is relatively homogeneous. Its minority groups include Vietnamese (2,800,000), Chinese (1,180,000), Cham (317,000), and Khmer Loeu (550,000). [63] The country's birth rate is 25.4 per 1,000. Its population growth rate is 1.70%, significantly higher than