Hello, @Pites,
1. Your issue has been resolved please check back your site now after removing the browser cache.
You can translate it from theme language files: https://aromatherapyoils.pl/wp-admin/admin.php?path=languages%2Fthemes%2Fxstore-pl_PL.po&bundle=xstore&domain=xstore&page=loco-theme&action=file-edit
https://postimg.cc/ThtdKYy8
https://postimg.cc/FYgnK1R3
2. That privacy policy is the Custom Text and you can change it from WooCommerce >> Settings >> Accounts and privacy as per your requirements: https://postimg.cc/18BXrcXt
3. Your issue has been solved please check back to your site now after removing the browser cache, I have translated it into the WooCommerce plugin language files: https://aromatherapyoils.pl/wp-admin/admin.php?path=languages%2Fplugins%2Fwoocommerce-pl_PL.po&bundle=woocommerce%2Fwoocommerce.php&domain=woocommerce&page=loco-plugin&action=file-edit
4. Your issue has been solved please check back to your site now after removing the browser cache, I have translated it into the WooCommerce plugin language files: https://aromatherapyoils.pl/wp-admin/admin.php?path=languages%2Fplugins%2Fwoocommerce-pl_PL.po&bundle=woocommerce%2Fwoocommerce.php&domain=woocommerce&page=loco-plugin&action=file-edit
For the remaining, I am not able to translate it because I am not able to check it as I do not have the payment account set, so please set the Cash On delivery method for a while, and then I’ll be able to make the order and go to the Thank You page and translate the remaining for you.
Regards 8Themes Team.