Australian Home Affairs translation requirements
Australian migration files may combine qualifications, experience, identity, character and family records. Home Affairs guidance distinguishes translations completed inside Australia from those completed outside Australia.
Home Affairs states that non-English documents should be translated into English. For translations completed outside Australia, published guidance asks for translator identity, contact details and qualifications in the language being translated. Check the specific visa page as well.
Requirements change. Check the current instructions from Australian Department of Home Affairs before submission.