Hello @manos,
We hope this message finds you well. This is coming from the WooCommerce plugin, so we suggest you translate it into the WooCommerce plugin language files. Please refer to the screenshots provided for further instructions. We are confident that this will help resolve your issue.
https://postimg.cc/WhTGZnQv
https://postimg.cc/6TLHFyKB
Best Regards,
8Theme’s Team