opencart-languagepack-finnish/catalog/extension/total/coupon.php

<?php
// Heading
$_['heading_title'] = 'Use Coupon Code';

// Text
$_['text_coupon']   = 'Coupon (%s)';
$_['text_success']  = 'Success: Your coupon discount has been applied!';

// Entry
$_['entry_coupon']  = 'Enter your coupon here';

// Error
$_['error_coupon']  = 'Varoitus: Coupon is either invalid, expired or reached its usage limit!';
$_['error_empty']   = 'Varoitus: Please enter a coupon code!';