Khmer is the main and official language of Cambodia.
Knowing a few Khmer words will help you earn some respect while in Cambodia.
Although Khmer uses base-10 numbers, the numbers for 1-9 are effectively spoken as base-5. Thus, six (prahm muay) literally means five (prahm), one (muay); whereas sixteen (dahp prahm muay) is ten (dahp), five (prahm), one (muay).
In practice, the word 'sep' is often omitted from the numbers for 30-90. However, it is generally considered more proper to include the word.
Bus and train
Pthaes - house
Pthaes kynom- my house
dtoh pthaes kynom- go to my house
baok (to drive) lanh (car)