Do you offer Chinese translation bounty?
As of now they don't have bounty for translation but if you are that hardworking then you can do it for them for free. Let's wait till they add the translation bounty on their blog .
The official answer from Propy team is below. Just submit your translation in form of "Other creative ideas"
I would like to reserve for arabic translation .
We kindly ask you to refer to the corresponded Bounty campaign section. You need to send an application to Other creative ideas and offer your kind of promotion. It is also advisable for you to include information about your previous translation experience. Thank you.