diff --git a/framework/sdk-parent/sdk/src/main/java/io/metersphere/controller/SystemParameterController.java b/framework/sdk-parent/sdk/src/main/java/io/metersphere/controller/SystemParameterController.java
index 7ff2a4f83d..81bce2125e 100644
--- a/framework/sdk-parent/sdk/src/main/java/io/metersphere/controller/SystemParameterController.java
+++ b/framework/sdk-parent/sdk/src/main/java/io/metersphere/controller/SystemParameterController.java
@@ -7,23 +7,27 @@ import io.metersphere.commons.constants.OperLogConstants;
 import io.metersphere.commons.constants.OperLogModule;
 import io.metersphere.commons.constants.ParamConstants;
 import io.metersphere.commons.constants.PermissionConstants;
-import io.metersphere.request.HeaderRequest;
+import io.metersphere.commons.user.SessionUser;
+import io.metersphere.commons.utils.SessionUtils;
 import io.metersphere.dto.BaseSystemConfigDTO;
 import io.metersphere.ldap.domain.LdapInfo;
 import io.metersphere.log.annotation.MsAuditLog;
 import io.metersphere.notice.domain.MailInfo;
+import io.metersphere.request.HeaderRequest;
 import io.metersphere.service.BaseUserService;
 import io.metersphere.service.SystemParameterService;
+import jakarta.annotation.Resource;
+import org.apache.commons.lang3.StringUtils;
 import org.apache.shiro.authz.annotation.Logical;
 import org.apache.shiro.authz.annotation.RequiresPermissions;
 import org.springframework.beans.factory.annotation.Value;
 import org.springframework.core.env.Environment;
 import org.springframework.web.bind.annotation.*;
 
-import jakarta.annotation.Resource;
 import java.time.Duration;
 import java.util.HashMap;
 import java.util.List;
+import java.util.Optional;
 
 @RestController
 @RequestMapping(value = "/system")
@@ -145,8 +149,13 @@ public class SystemParameterController {
 
     @GetMapping(value = "/default-locale")
     public String defaultLocale() {
-        return defaultLocale;
+        SessionUser user = SessionUtils.getUser();
+        String language = Optional.ofNullable(user)
+                .map(SessionUser::getLanguage)
+                .filter(StringUtils::isNotBlank)
+                .orElse(defaultLocale);
+
+        return language.replace("_", "-");
     }
 
-
 }