Change the coupon error message for specific coupons

Customize the error message for specific coupons.

add_filter('woocommerce_coupon_error', function ($error_message, $error_code, $coupon){
    // The below coupon name should be lowercase
    $awdr_coupons = ['example1', 'example2'];        //You can add the coupons here (with comma separate)
    if(in_array($coupon->code, $awdr_coupons)){
        $error_message = 'Coupon "' . $coupon->code . '" is invalid';       //You can change the message as per your need
    }
    return $error_message;
}, 10, 3);