shoppingcart.php

<?php

add_filter('gettext', 'translate_text');

add_filter('ngettext', 'translate_text');



function translate_text($translated) {

$translated = str_ireplace('Shopping Cart', 'Warenkorb', $translated);

$translated = str_ireplace('Checkout details', 'Bestellübersicht', $translated);

$translated = str_ireplace('Order Complete', 'Bestellung ausgeführt', $translated);

return $translated;

}