@elvey Hi! Sorry for the late reply. Can you give us the link where you found the indonesian language on Khan Academy?
Does this mean that only the admin interface has been translated to Indonesian and none of the content has?
Yep, only the interface was translated to Indonesian language and not the whole topics and videos available on the English content. Since I looked into the Indonesian content packs, it seems like the database is empty and there are no available videos for it.