Mastering Indonesian will take from you 36 hours or 900 weeks in a class according to FSI. Difficulty category for mastering it is evaluated - point.
Learning Khmer might seem like a overwhelming thing to do. FSI has concluded that it takes 1100 hours or 44 weeks in a class to learn the language. The difficulty point is 2.
You will most likely find people, who speaks Indonesian in Indonesia, Netherlands, the Philippines, Saudi Arabia, Singapore, and the U.S.
Number of native speakers is about 23,000,000.
Number of fluent speakers is about 163,000,000. The biggest country in which Indonesian is used as a native language is Indonesia.
Native speakers of Khmer are mostly from Cambodia and are about 13,000,000 people.
Khmer are spoken fluently by 15,000,000 people.
The language is spoken in Cambodia, Vietnam, Thailand, Canada, China, France, Laos, USA..
Indonesian came from Malayo-Polynesian branch of the Austronesian language family.
Mon-Khmer branch of the Austroasiatic language family is the origin of Khmer language.