In reply to:
In Indonesian there are two words for someone who has lost a parent: yatim for someone who has lost their father..."
Interestingly, in Urdu, 'yateem' (or 'yatim') means an orphan too... though it isn't specific to a child who has lost his/her father.
Orphan in Indonesian is yatim piatu, i.e., fatherless motherless.
One thing I have noticed is that if you ask an Indonesian how many brothers and sisters they have, the answer will include any deceased siblings. So they might say "5 but 2 died", or they might say 5 and not bother to tell you that 2 of them died. I haven't asked many parents how many children they have, so I'm not sure if the same holds for parents.
Bingley