Regarding the coupon code for GT4T, a one-stop desktop translation software, both "FOX" and "fox" were available before. However, because of the case sensitivity, "Fox" was not available, so a group of users could not use the GT4T coupon code.
Now you can enjoy the discount on GT4T regardless of "FOX", "fox", or "Fox". You can ask the online customer service in the software for help, including the use of coupon codes.