Is Khmer hard to learn?

Khmer is a truly difficult language for Westerners to learn, harder than Mandarin to speak, and harder than anything other than Chinese or Japanese to read. There are several difficulties. To top it off, there is no standard, intuitive system to transcribe Khmer into the Latin alphabet.

Why is there no McDonalds in Cambodia?

Certain countries do not have McDonalds restaurants. Although you will find the chain in many parts of Asia, there are none to be found in Cambodia. The population here relies heavily on rice, seafood and tropical fruits for their diet, so there really is no market for McDonalds.