// Define langauge strings
define("_PHPSHOP_LIST_ALL_PRODUCTS", "Toon alle producten");
define("_PHPSHOP_DOWNLOADS", "Downloadomgeving");
define("_PHPSHOP_ADVANCED_SEARCH", "Uitgebreid zoeken");
define("_PHPSHOP_CART", "Mandje");
define("_PHPSHOP_CART_ADD", "Toevoegen");
define("_PHPSHOP_CART_UPDATE", "Vernieuw de hoeveelheid in het mandje");
define("_PHPSHOP_CART_DELETE", "Verwijder product uit uw mandje");
define("_PHPSHOP_CART_SAVED", "Opgeslagen mandje");
define("_PHPSHOP_REGISTER", "Registratie");
define("_PHPSHOP_INDEX", "Index");
define("_PHPSHOP_ACCOUNT", "Account onderhoud");
define("_PHPSHOP_BILLING", "Facturatie gegevens");
define("_PHPSHOP_CHECKOUT", "Afrekenen");
define("_PHPSHOP_SHIPPING", "Verzendinformatie");
define("_PHPSHOP_SHIPPING_ADRESS", "Adres toevoegen");
define("_PHPSHOP_ORDER", "Bestelling");
define("_PHPSHOP_SSL", "SSL");
define("_PHPSHOP_FEED", "Feed");
define("_PHPSHOP_PARAMETER_SEARCH", "Producten zoeken met parameters");
define("_PHPSHOP_PARAMETER_FORM", "Formulier");
define("_PHPSHOP_ASK", "Stel een vraag");
define("_PHPSHOP_ASK_CALL", "Neem contact op voor een prijsopgave");
define("_PHPSHOP_WAITING_LIST", "Wachtlijst");
define("_PHPSHOP_TOS", "Leveringsvoorwaarden");
define("_PHPSHOP_RESULT", "Resultaat");

// Define langauge strings
define("_PHPSHOP_LIST_ALL_PRODUCTS", "Toon alle producten");
define("_PHPSHOP_DOWNLOADS", "Downloadomgeving");
define("_PHPSHOP_ADVANCED_SEARCH", "Uitgebreid zoeken");
define("_PHPSHOP_CART", "Mandje");
define("_PHPSHOP_CART_ADD", "Toevoegen");
define("_PHPSHOP_CART_UPDATE", "Vernieuw de hoeveelheid in het mandje");
define("_PHPSHOP_CART_DELETE", "Verwijder product uit uw mandje");
define("_PHPSHOP_CART_SAVED", "Opgeslagen mandje");
define("_PHPSHOP_REGISTER", "Registratie");
define("_PHPSHOP_INDEX", "Index");
define("_PHPSHOP_ACCOUNT", "Account onderhoud");
define("_PHPSHOP_BILLING", "Facturatie gegevens");
define("_PHPSHOP_CHECKOUT", "Afrekenen");
define("_PHPSHOP_SHIPPING", "Verzendinformatie");
define("_PHPSHOP_SHIPPING_ADRESS", "Adres toevoegen");
define("_PHPSHOP_ORDER", "Bestelling");
define("_PHPSHOP_SSL", "SSL");
define("_PHPSHOP_FEED", "Feed");
define("_PHPSHOP_PARAMETER_SEARCH", "Producten zoeken met parameters");
define("_PHPSHOP_PARAMETER_FORM", "Formulier");
define("_PHPSHOP_ASK", "Stel een vraag");
define("_PHPSHOP_ASK_CALL", "Neem contact op voor een prijsopgave");
define("_PHPSHOP_WAITING_LIST", "Wachtlijst");
define("_PHPSHOP_TOS", "Leveringsvoorwaarden");
define("_PHPSHOP_RESULT", "Resultaat");

Thank you Roeland, for which language is this?

Dutch, apologies!