diff --git a/frontend/src/i18n/zh-cn.json b/frontend/src/i18n/zh-cn.json
index c50e2d4e..c18c7e98 100644
--- a/frontend/src/i18n/zh-cn.json
+++ b/frontend/src/i18n/zh-cn.json
@@ -101,7 +101,10 @@
     "submit": "登录",
     "username": "用户名",
     "usernameTaken": "用户名已经被使用",
-    "wrongCredentials": "用户名或密码错误"
+    "wrongCredentials": "用户名或密码错误",
+    "logout_reasons": {
+      "inactivity": "You have been logged out due to inactivity."
+    }
   },
   "permanent": "永久",
   "prompts": {