Actually, I talked about the topic in this post I made some time ago
Thing is they would end up being very similar to malays if made completely accurate. I could forgive having random bonuses that doesn’t reflect anything specific like the house and buildings bonus if at the end of the day your armies more or less fit the culture.
Instead when I see khmer I see this
It’s toe to toe with the old indian camels in level of incoherence.