We use Crowdin for translating the Django Girls tutorial.
Go to our Crowdin page and have a look. If the language you want to translate the tutorial into is already listed, all you need to do is to create a free account on Crowdin and start contributing.
If the language you want to help with is missing, you can tell us so by:
We will let you know as soon as we have added the language to our Crowdin page. Once that has happened, you can start translating, yay!