diff --git a/src/main/java/com/lyxh/api/docking/service/PaymentProfileService.java b/src/main/java/com/lyxh/api/docking/service/PaymentProfileService.java
index ef4e6c1..9a1aff3 100644
--- a/src/main/java/com/lyxh/api/docking/service/PaymentProfileService.java
+++ b/src/main/java/com/lyxh/api/docking/service/PaymentProfileService.java
@@ -35,12 +35,15 @@ public class PaymentProfileService {
     private ObjectMapper objectMapper;
 
     public PaymentProfileResponse query(PaymentProfileRequest request, String xRequestId, String language,
-                                         String weOrderNo) {
+                                        String weOrderNo) {
         boolean isEncrypted = request.getEncryptAlgo() != null && !request.getEncryptAlgo().isBlank();
         String idCardForCache = isEncrypted ? request.getIdCard() : DigestUtils.md5Hex(request.getIdCard());
         String mobileForCache = isEncrypted ? request.getMobile() : DigestUtils.md5Hex(request.getMobile());
+        if (language == null) {
+            language = "en";
+        }
         String cacheKey = DigestUtils.md5Hex(request.getName() + "|" + idCardForCache + "|" + mobileForCache
-                + "|" + (language != null ? language : ""));
+                + "|" + language);
 
         FortispayRequest ftRequest = FortispayRequest.builder()
                 .name(request.getName())
diff --git a/对接接口文档.md b/对接接口文档.md
index 50060d5..da4b07a 100644
--- a/对接接口文档.md
+++ b/对接接口文档.md
@@ -14,7 +14,7 @@
 |---|---|---|------------------------------|
 | Content-Type | String | Y | `application/json`           |
 | X-Request-Id | String | N | 网关请求唯一标识ID，用于全链路追踪，原样回显在响应头中 |
-| X-Language | String | N | 语言标识，传 `en` 返回英文结果，不传默认中文    |
+| X-Language | String | N | 语言标识，传 `en` 返回英文结果，不传默认英文    |
 
 ## 响应头部