Hello, Oliver,
We provide a partial translation, as indicated in the documentation: https://www.8theme.com/documentation/xstore/theme-translation/base-theme-translation/ You are welcome to continue or complete it on your own.
Please be aware that you only need to translate the necessary strings that are visible on the frontend; there is no need to manually translate to 100%.
Regarding your inquiry about restoring a previous translation, unfortunately, such an option is not available through either the Loco Translate plugin or the theme itself. If any files have been deleted, we recommend contacting your hosting provider to check if they have a backup available. Many hosting providers regularly create backups for their clients.
If no backup exists and the file has been deleted, please note that this issue is unrelated to the theme used on your website. We have already done everything within our capacity to assist you with translations.
Best Regards,
8Theme’s Team