And could it have anything to do with the includes/languages/english.php file?
define('BOX_INFORMATION_DISCOUNT_COUPONS', 'Discount Coupons');
define('BOX_INFORMATION_GV', TEXT_GV_NAME . ' FAQ');
define('VOUCHER_BALANCE', TEXT_GV_NAME . ' Balance ');
define('BOX_HEADING_GIFT_VOUCHER', TEXT_GV_NAME . ' Account');
define('GV_FAQ', TEXT_GV_NAME . ' FAQ');
define('ERROR_REDEEMED_AMOUNT', 'Congratulations, you have redeemed ');
define('ERROR_NO_REDEEM_CODE', 'You did not enter a ' . TEXT_GV_REDEEM . '.');
define('ERROR_NO_INVALID_REDEEM_GV', 'Invalid ' . TEXT_GV_NAME . ' ' . TEXT_GV_REDEEM);
define('TABLE_HEADING_CREDIT', 'Credits Available');
define('GV_HAS_VOUCHERA', 'You have funds in your ' . TEXT_GV_NAME . ' Account. If you want <br />
you can send those funds by <a class="pageResults" href="');
define('GV_HAS_VOUCHERB', '"><strong>email</strong></a> to someone');
define('ENTRY_AMOUNT_CHECK_ERROR', 'You do not have enough funds to send this amount.');
define('BOX_SEND_TO_FRIEND', 'Send ' . TEXT_GV_NAME . ' ');
define('VOUCHER_REDEEMED', TEXT_GV_NAME . ' Redeemed');
define('CART_COUPON', 'Coupon :');
define('CART_COUPON_INFO', 'more info');
define('TEXT_SEND_OR_SPEND','You have a balance available in your ' . TEXT_GV_NAME . ' account. You may spend it or send it to someone else. To send click the button below.');
define('TEXT_BALANCE_IS', 'Your ' . TEXT_GV_NAME . ' balance is: ');
define('TEXT_AVAILABLE_BALANCE', 'Your ' . TEXT_GV_NAME . ' Account');
// payment method is GV/Discount
define('PAYMENT_METHOD_GV', 'Gift Certificate/Coupon');
define('PAYMENT_MODULE_GV', 'GV/DC');
define('TABLE_HEADING_CREDIT_PAYMENT', 'Credits Available');
define('TEXT_INVALID_REDEEM_COUPON', 'Invalid Coupon Code');
define('TEXT_INVALID_REDEEM_COUPON_MINIMUM', 'You must spend at least %s to redeem this coupon');
define('TEXT_INVALID_STARTDATE_COUPON', 'This coupon is not available yet');
define('TEXT_INVALID_FINISHDATE_COUPON', 'This coupon has expired');
define('TEXT_INVALID_USES_COUPON', 'This coupon could only be used ');
define('TIMES', ' times.');
define('TIME', ' time.');
define('TEXT_INVALID_USES_USER_COUPON', 'You have used coupon code: %s the maximum number of times allowed per customer. ');
define('REDEEMED_COUPON', 'a coupon worth ');
define('REDEEMED_MIN_ORDER', 'on orders over ');
define('REDEEMED_RESTRICTIONS', ' [Product-Category restrictions apply]');
define('TEXT_ERROR', 'An error has occurred');
define('TEXT_INVALID_COUPON_PRODUCT', 'This coupon code is not valid for any product currently in your cart.');
define('TEXT_VALID_COUPON', 'Congratulations you have redeemed the Discount Coupon');
define('TEXT_REMOVE_REDEEM_COUPON_ZONE', 'The coupon code you entered is not valid for the address you have selected.');