Where do I find the namespace backups?

What are backups? Namespace backups are created each time a namespace gets published (manually or automatically) and are retained for 30 days.

Select your desired version:

Then select "ROLLBACK CONTENT (BACKUPS9" in the drop down menu:

Here you can select your desired action:

Only the previous/old namespace versions are listed as backups. The current version of the published translations can be found by clicking "Show me the publish / CDN details"