As anobtc already stated you should find all the information in the bounty thread of the project.
There should be mentioned how many stakes or tokens you get for what translation, ANN / Website / Whitepaper.
If anything is unclear and your language is not reserved or translated yet, it is a good idea to reply in the bounty thread to
1) reserve your language so that you get the stakes, even if you cannot start because something is unclear
2) get your questions answererd
As an alternative you could go to the telegram group of the project and ask there or write the bounty manager of the project a DM on bitcointalk or telegram.
Be nice and understanding, this way everything will work out
I wish you success!