You should have these 2 files (taken from recent download of this pack):

admin/includes/languages/swedish/orders.php

PHP Code:
<?php 
/** 
 * @package admin 
 * @copyright Copyright 2003-2007 Zen Cart Development Team 
 * @copyright Portions Copyright 2003 osCommerce 
 * @license http://www.zen-cart.com/license/2_0.txt GNU Public License V2.0 
 * @version $Id: orders.php 6214 2007-04-17 02:24:25Z ajeh $ 
 */ 
 /* 
 * Zen Cart version 1.5.0 - 
 * @Swedish Translation 2011 - Signs FrilansReklam, www.frilansreklam.se 
 * @Swedish support - www.zencart.nu - Svenska Zen Cart 
 */ 
define('HEADING_TITLE''Order'); 
define('HEADING_TITLE_SEARCH''Order ID:'); 
define('HEADING_TITLE_STATUS''Status:'); 
define('HEADING_TITLE_SEARCH_DETAIL_ORDERS_PRODUCTS''S&ouml;k p&aring; Produkt Namn eller <strong>ID:XX</strong> eller Artikelnr '); 
define('TEXT_INFO_SEARCH_DETAIL_FILTER_ORDERS_PRODUCTS''S&ouml;k Filter: '); 
define('TABLE_HEADING_PAYMENT_METHOD''Betalning<br />Frakt'); 
define('TABLE_HEADING_ORDERS_ID','ID'); 
 
define('TEXT_BILLING_SHIPPING_MISMATCH','Betalnings- och leveransadresserna &auml;r inte samma '); 
 
define('TABLE_HEADING_COMMENTS''Kommentarer'); 
define('TABLE_HEADING_CUSTOMERS''Kunder'); 
define('TABLE_HEADING_ORDER_TOTAL''Order Total'); 
define('TABLE_HEADING_DATE_PURCHASED''Orderdatum'); 
define('TABLE_HEADING_STATUS''Status'); 
define('TABLE_HEADING_TYPE''Order Typ'); 
define('TABLE_HEADING_ACTION''&Aring;tg&auml;rd'); 
define('TABLE_HEADING_QUANTITY''Antal.'); 
define('TABLE_HEADING_PRODUCTS_MODEL''Artikelnr'); 
define('TABLE_HEADING_PRODUCTS''Produkter'); 
define('TABLE_HEADING_TAX''Moms'); 
define('TABLE_HEADING_TOTAL''Total'); 
define('TABLE_HEADING_PRICE_EXCLUDING_TAX''Pris (exkl)'); 
define('TABLE_HEADING_PRICE_INCLUDING_TAX''Pris (inkl)'); 
define('TABLE_HEADING_TOTAL_EXCLUDING_TAX''Total (exkl)'); 
define('TABLE_HEADING_TOTAL_INCLUDING_TAX''Total (inkl)'); 
 
define('TABLE_HEADING_CUSTOMER_NOTIFIED''Kund meddelad'); 
define('TABLE_HEADING_DATE_ADDED''Datum inlagd'); 
 
define('ENTRY_CUSTOMER''Kund:'); 
define('ENTRY_SOLD_TO''S&Aring;LD TILL:'); 
define('ENTRY_DELIVERY_TO''Leverans till:'); 
define('ENTRY_SHIP_TO''FRAKT TILL:'); 
define('ENTRY_SHIPPING_ADDRESS''Leveransadress:'); 
define('ENTRY_BILLING_ADDRESS''Faktureringsadress:'); 
define('ENTRY_PAYMENT_METHOD''Betalningsmetod:'); 
define('ENTRY_CREDIT_CARD_TYPE''Kreditkorts typ:'); 
define('ENTRY_CREDIT_CARD_OWNER''Kreditkorts &auml;gare:'); 
define('ENTRY_CREDIT_CARD_NUMBER''Kreditkorts nummer:'); 
define('ENTRY_CREDIT_CARD_CVV''Kreditkorts CVV Nummer:'); 
define('ENTRY_CREDIT_CARD_EXPIRES''Kreditkort giltligt till:'); 
define('ENTRY_SUB_TOTAL''Delsumma:'); 
define('ENTRY_TAX''Moms:'); 
define('ENTRY_SHIPPING''Frakt:'); 
define('ENTRY_TOTAL''Total:'); 
define('ENTRY_DATE_PURCHASED''Orderdatum:'); 
define('ENTRY_STATUS''Status:'); 
define('ENTRY_DATE_LAST_UPDATED''Senast uppdaterad:'); 
define('ENTRY_NOTIFY_CUSTOMER''Meddela kund:'); 
define('ENTRY_NOTIFY_COMMENTS''Bifoga kommentarer:'); 
define('ENTRY_PRINTABLE''Skriv ut order'); 
 
define('TEXT_INFO_HEADING_DELETE_ORDER''Radera Order'); 
define('TEXT_INFO_DELETE_INTRO''&Auml;r du s&auml;ker p&aring; att du vill radera denna order?'); 
define('TEXT_INFO_RESTOCK_PRODUCT_QUANTITY''F&ouml;rnya produktkvantiteten'); 
define('TEXT_DATE_ORDER_CREATED''Datum Inlagd:'); 
define('TEXT_DATE_ORDER_LAST_MODIFIED''Senast &auml;ndrad:'); 
define('TEXT_INFO_PAYMENT_METHOD''Betalnings metod:'); 
define('TEXT_PAID''Betald'); 
define('TEXT_UNPAID''Obetald'); 
 
define('TEXT_ALL_ORDERS''Alla Ordrar'); 
define('TEXT_NO_ORDER_HISTORY''Ingen Order Historik Finns'); 
 
define('EMAIL_SEPARATOR''------------------------------------------------------'); 
define('EMAIL_TEXT_SUBJECT''Order Uppdatering'); 
define('EMAIL_TEXT_ORDER_NUMBER''Ordernummer:'); 
define('EMAIL_TEXT_INVOICE_URL''Detaljerad order:'); 
define('EMAIL_TEXT_DATE_ORDERED''Orderdatum:'); 
define('EMAIL_TEXT_COMMENTS_UPDATE''<em>Kommentarer för din order är: </em>'); 
define('EMAIL_TEXT_STATUS_UPDATED''Din order har uppdaterats till följande status:' "\n"); 
define('EMAIL_TEXT_STATUS_LABEL''<strong>Ny status:</strong> %s' "\n\n"); 
define('EMAIL_TEXT_STATUS_PLEASE_REPLY''Vänligen svara på detta epostmeddelande om du har några fr&aring;gor.' "\n"); 
 
define('ERROR_ORDER_DOES_NOT_EXIST''FEL: Ordern finns inte.'); 
define('SUCCESS_ORDER_UPDATED''LYCKAT: Ordern har blivit uppdaterad.'); 
define('WARNING_ORDER_NOT_UPDATED''Varning: Ingen &auml;ndring har valt. Ordern uppdaterades inte.'); 
 
define('ENTRY_ORDER_ID','Ordernummer '); 
define('TEXT_INFO_ATTRIBUTE_FREE''&nbsp;-&nbsp;<span class="alert">GRATIS</span>'); 
 
define('TEXT_DOWNLOAD_TITLE''Order Nerladdnings Status'); 
define('TEXT_DOWNLOAD_STATUS''Status'); 
define('TEXT_DOWNLOAD_FILENAME''Filnamn'); 
define('TEXT_DOWNLOAD_MAX_DAYS''Dagar'); 
define('TEXT_DOWNLOAD_MAX_COUNT''Sammanr&auml;kning'); 
 
define('TEXT_DOWNLOAD_AVAILABLE''Tillg&auml;nglig'); 
define('TEXT_DOWNLOAD_EXPIRED''Avslutad'); 
define('TEXT_DOWNLOAD_MISSING''Finns inte p&aring; servern'); 
 
define('IMAGE_ICON_STATUS_CURRENT''Status - Tillg&auml;nglig'); 
define('IMAGE_ICON_STATUS_EXPIRED''Status - Avslutad'); 
define('IMAGE_ICON_STATUS_MISSING''Status - Saknas'); 
 
define('SUCCESS_ORDER_UPDATED_DOWNLOAD_ON''Nerladdningen har aktiverats'); 
define('SUCCESS_ORDER_UPDATED_DOWNLOAD_OFF''Nerladdningen har inaktiverats'); 
define('TEXT_MORE''... mer'); 
 
define('TEXT_INFO_IP_ADDRESS''IP Adress: '); 
define('TEXT_DELETE_CVV_FROM_DATABASE','Radera CVV fr&aring;n databasen'); 
define('TEXT_DELETE_CVV_REPLACEMENT','Raderad'); 
define('TEXT_MASK_CC_NUMBER','Maskera detta nummer'); 
 
define('TEXT_INFO_EXPIRED_DATE''Giltlig till:<br />'); 
define('TEXT_INFO_EXPIRED_COUNT''nedr&auml;knat antal:<br />'); 
 
define('TABLE_HEADING_CUSTOMER_COMMENTS''Kund<br />Kommentar'); 
define('TEXT_COMMENTS_YES''Kund kommentar - JA'); 
define('TEXT_COMMENTS_NO''Kund kommentar - NEJ'); 
 
define('SELECT_ORDER_LIST''G&aring; till order'); 
define('BUTTON_TO_LIST''Orderlista'); 
define('TEXT_WHOIS_LOOKUP''Who-Is s&ouml;kning'); 
?>

includes/languages/swedish/checkout_process.php

PHP Code:
<?php 
// 
// +----------------------------------------------------------------------+ 
// |zen-cart Open Source E-commerce                                       | 
// +----------------------------------------------------------------------+ 
// | Copyright (c) 2003 The zen-cart developers                           | 
// |                                                                      | 
// | http://www.zen-cart.com/index.php                                    | 
// |                                                                      | 
// | Portions Copyright (c) 2003 osCommerce                               | 
// +----------------------------------------------------------------------+ 
// | This source file is subject to version 2.0 of the GPL license,       | 
// | that is bundled with this package in the file LICENSE, and is        | 
// | available through the world-wide-web at the following url:           | 
// | http://www.zen-cart.com/license/2_0.txt.                             | 
// | If you did not receive a copy of the zen-cart license and are unable | 
// | to obtain it through the world-wide-web, please send a note to       | 
// | [email protected] so we can mail you a copy immediately.          | 
// +----------------------------------------------------------------------+ 
// $Id: checkout_process.php 1969 2005-09-13 06:57:21Z drbyte $ 
// 
 /* 
 * Zen Cart version 1.5.0 - 
 * @Swedish Translation 2011 - Signs FrilansReklam, www.frilansreklam.se 
 * @Swedish support - www.zencart.nu - Svenska Zen Cart 
 */ 
 
define('EMAIL_TEXT_SUBJECT''Order Bekräftelse'); 
define('EMAIL_TEXT_HEADER''Order Bekräftelse'); 
define('EMAIL_TEXT_FROM',' från ');  //added to the EMAIL_TEXT_HEADER, above on text-only emails 
define('EMAIL_THANKS_FOR_SHOPPING','Tack för att Ni handlat hos oss!'); 
define('EMAIL_DETAILS_FOLLOW','Följande är information från din order.'); 
define('EMAIL_TEXT_ORDER_NUMBER''Ordernummer:'); 
define('EMAIL_TEXT_INVOICE_URL''Detaljerad faktura:'); 
define('EMAIL_TEXT_INVOICE_URL_CLICK''Klicka här för detaljerad faktura'); 
define('EMAIL_TEXT_DATE_ORDERED''Orderdatum:'); 
define('EMAIL_TEXT_PRODUCTS''Produkter'); 
define('EMAIL_TEXT_SUBTOTAL''Delsumma:'); 
define('EMAIL_TEXT_TAX''Moms:        '); 
define('EMAIL_TEXT_SHIPPING''Frakt: '); 
define('EMAIL_TEXT_TOTAL''Total:    '); 
define('EMAIL_TEXT_DELIVERY_ADDRESS''Leveransadress'); 
define('EMAIL_TEXT_BILLING_ADDRESS''Faktureringsadress'); 
define('EMAIL_TEXT_PAYMENT_METHOD''Betalningsmetod'); 
 
define('EMAIL_SEPARATOR''------------------------------------------------------'); 
define('TEXT_EMAIL_VIA''via'); 
 
// suggest not using # vs No as some spamm protection block emails with these subjects 
define('EMAIL_ORDER_NUMBER_SUBJECT'' Nr: '); 
define('HEADING_ADDRESS_INFORMATION','Adress Information'); 
define('HEADING_SHIPPING_METHOD','Frakt metod'); 
?>