Hello,

1. You can change the cart text from here: https://permanentinstitut.cz/wp-admin/admin.php?path=languages%2Fplugins%2Fwoocommerce-cs_CZ.po&bundle=woocommerce%2Fwoocommerce.php&domain=woocommerce&page=loco-plugin&action=file-edit

Screenshot: http://prnt.sc/p8zkyx

2. You can change the checkout text from Woocommerce >> Settings >> Accounts & Privacy Tab >> Change the Privacy Policy Text. Screenshot: http://prnt.sc/p8zkke

Best Regards.