first commit

catalog/language/en-gb/api/sale/coupon.php

@@ -0,0 +1,7 @@
+<?php
+// Text
+$_['text_success'] = 'Success: Your coupon discount has been applied!';
+$_['text_remove']  = 'Success: Your coupon discount has been removed!';
+
+// Error
+$_['error_coupon'] = 'Warning: Coupon is either invalid, expired or reached it\'s usage limit!';