If the translation is for the purpose of driving on an overseas licence, it is suggested that you refer your enquiry to the Police as they are the authority to who you will be required to provide the translation if requested.
If the translation is for the purpose of obtaining a NSW licence, please see the "Documents not written in English" section of the below page:
Thank you for enquiry concerning licence translation.
It is a legislated requirement to carry a certified English written translation while driving a motor vehicle in New South Wales as outlined under the Road Transport (Driver Licencing) Regulation 2008 which I have copied and pasted for you below:
Road Transport (Driver Licensing) Regulation 2008
Current version for 16 March 2015 to date (accessed 17 April 2015 at 14:49)
99 Interstate and international visitors
(cf cl 55 1999 Reg)
(1) A visiting driver who holds:
(a) a current Australian driver licence or learner licence (including a New Zealand driver licence or learner licence) issued in another jurisdiction, or
(b) a current foreign driver licence and international driving permit, or
(c) a current foreign driver licence that is written in English or is accompanied by an English translation,
that authorises him or her to drive a motor vehicle of a particular kind may drive a motor vehicle of that kind in this State, and is exempt from NSW driver licence holding requirements.
(2) A visiting driver who holds:
(a) a current foreign driver licence and international driving permit, or
(b) a current foreign driver licence that is written in English or is accompanied by an English translation,
that authorises its holder to drive a motor vehicle may, in this State, drive a motor vehicle with a GVM that is not greater than 4.5 tonnes and that is constructed or equipped to seat not more than 12 adults (including the driver), and is exempt from NSW driver licence holding requirements.