You must read what are the requirements of the campaign and the rules, better if you want to join translation even you are a newbie is to send a sample of your work to the campaign manager. You can also directly as the campaign manager if you have questions about the campaign. But be careful in translating there are moderators that checking and verify your work that can fully read and understand your work, so better you know about the language you select to translate and dont use google translation
Thank you so much , that's a great help for me.