diff --git a/api/controllers/console/auth/forgot_password.py b/api/controllers/console/auth/forgot_password.py
index 04999b60eb..005f38b8e5 100644
--- a/api/controllers/console/auth/forgot_password.py
+++ b/api/controllers/console/auth/forgot_password.py
@@ -31,19 +31,20 @@ class ForgotPasswordSendEmailApi(Resource):
         parser.add_argument("language", type=str, required=False, location="json")
         args = parser.parse_args()
 
+        if args["language"] is not None and args["language"] == "zh-Hans":
+            language = "zh-Hans"
+        else:
+            language = "en-US"
+
         account = Account.query.filter_by(email=args["email"]).first()
         token = None
         if account is None:
             if dify_config.ALLOW_REGISTER:
-                token = AccountService.send_reset_password_email(
-                    email=args["email"], language=args["language"] or "en-US"
-                )
+                token = AccountService.send_reset_password_email(email=args["email"], language=language)
             else:
                 raise NotAllowedRegister()
         else:
-            token = AccountService.send_reset_password_email(
-                account=account, email=args["email"], language=args["language"] or "en-US"
-            )
+            token = AccountService.send_reset_password_email(account=account, email=args["email"], language=language)
 
         return {"result": "success", "data": token}
 
diff --git a/api/controllers/console/auth/login.py b/api/controllers/console/auth/login.py
index a419561d42..601449af2e 100644
--- a/api/controllers/console/auth/login.py
+++ b/api/controllers/console/auth/login.py
@@ -84,16 +84,19 @@ class ResetPasswordSendEmailApi(Resource):
         parser.add_argument("language", type=str, required=False, location="json")
         args = parser.parse_args()
 
+        if args["language"] is not None and args["language"] == "zh-Hans":
+            language = "zh-Hans"
+        else:
+            language = "en-US"
+
         account = AccountService.get_user_through_email(args["email"])
         if account is None:
             if dify_config.ALLOW_REGISTER:
-                token = AccountService.send_reset_password_email(
-                    email=args["email"], language=args["language"] or "en-US"
-                )
+                token = AccountService.send_reset_password_email(email=args["email"], language=language)
             else:
                 raise NotAllowedRegister()
         else:
-            token = AccountService.send_reset_password_email(account=account, language=args["language"])
+            token = AccountService.send_reset_password_email(account=account, language=language)
 
         return {"result": "success", "data": token}
 
@@ -106,16 +109,19 @@ class EmailCodeLoginSendEmailApi(Resource):
         parser.add_argument("language", type=str, required=False, location="json")
         args = parser.parse_args()
 
+        if args["language"] is not None and args["language"] == "zh-Hans":
+            language = "zh-Hans"
+        else:
+            language = "en-US"
+
         account = AccountService.get_user_through_email(args["email"])
         if account is None:
             if dify_config.ALLOW_REGISTER:
-                token = AccountService.send_email_code_login_email(
-                    email=args["email"], language=args["language"] or "en-US"
-                )
+                token = AccountService.send_email_code_login_email(email=args["email"], language=language)
             else:
                 raise NotAllowedRegister()
         else:
-            token = AccountService.send_email_code_login_email(account=account, language=args["language"])
+            token = AccountService.send_email_code_login_email(account=account, language=language)
 
         return {"result": "success", "data": token}
 
diff --git a/api/services/account_service.py b/api/services/account_service.py
index 65d9959818..59aded2292 100644
--- a/api/services/account_service.py
+++ b/api/services/account_service.py
@@ -258,7 +258,6 @@ class AccountService:
         cls, account: Optional[Account] = None, email: Optional[str] = None, language: Optional[str] = "en-US"
     ):
         account_email = account.email if account else email
-        account_language = account.interface_language if account else language
 
         if cls.reset_password_rate_limiter.is_rate_limited(account_email):
             from controllers.console.auth.error import PasswordResetRateLimitExceededError
@@ -270,7 +269,7 @@ class AccountService:
             account=account, email=email, token_type="reset_password", additional_data={"code": code}
         )
         send_reset_password_mail_task.delay(
-            language=account_language,
+            language=language,
             to=account_email,
             code=code,
         )
@@ -299,7 +298,7 @@ class AccountService:
             account=account, email=email, token_type="email_code_login", additional_data={"code": code}
         )
         send_email_code_login_mail_task.delay(
-            language=account.interface_language if account else language,
+            language=language,
             to=account.email if account else email,
             code=code,
         )