"Kakek adalah ayah saya."
Terjemahan:Grandfather is my father.
This is a very unnatural sentence. English doesn't really use "grandfather" to mean any older man in the way that some other languages do. Grandfather is pretty much only "a parent's father".
The only way for this to make sense in English, would be talking to your son/daughter, and saying your grandfather is my father.
I have reported it.
"Grandad is my father" does not work well either. The same as with "grandfather", it would mean "My grandad is my father" - which would mean very weird incest going on in the family, probably involving time travel.
I think the Bahasa is saying "That old man is my father"