I know it's a pain, but if you don't enter your basic information, we won't know who to credit for the translation work.
If you prefer, you can just click through as "Anonymous" and go un-credited. But you need to make that choice.
Oh, and by clicking through this box, you're assigning all rights to the translated text to 1889 Labs Ltd, which in turn is releasing them under a Creative Commons Attribution NonCommercial ShareAlike license. Which means you're not getting paid.
Read the text on the left and enter your translation on the right. Click outside the text box to save. If you want to review past revisions on a field, click the green arrow next to the box. To restore an old version, click on it in the list.