Board Thread:Support Requests - Community Management/@comment-26242174-20150625224521/@comment-4632631-20150627010636

Yatalu wrote: I believe their admin actually knows English :) he's posted on my wall before on another wiki. Currently, the IVT (International Volunteering Team) doesn't have any Indonesian Helper; I know a bit of Indonesian, but not enough to communicate with users.

As for credits, or attribution as it's called in CC-by-SA terminology, you can suggest that they put "translated/taken from the English Haikyuu wiki" (in Indonesian) in the edit summary. This is less visible, but more permanent than a template. It's "CC-BY-SA", not "CC-by-SA".