I have found "kabar" today. Instantly, I recognised that it is another spelling of "khabar".

I know "khabar" is a loanword from Arabic,but 3 questions occurred to me that

 1:Which is appropriate? Does it depend on the situation?

2:How should I pronounce? Pronounce literally /k/ or /x/ like Arabic?

3:Where are they used in? Indonesia or Malaysia?

Finally, this post plays a role as writing practice of English,so if you find my mistakes or unnatural grammar, please let me know.

I would be grateful for your help.