support use 2fa backup code

src/locales/zh_Hans.js

@@ -5,6 +5,7 @@ export default {
         }
     },
     'error': {
+        'system error': '系统错误',
         'unauthorized access': '未授权的登录',
         'token is expired': '认证令牌已过期',
         'token is invalid': '认证令牌无效',
@@ -26,10 +27,10 @@ export default {
         'login name or password is invalid': '登录名或密码无效',
         'login name or password is wrong': '登录名或密码错误',
         'passcode is invalid': '验证码无效',
-        'two factor recovery code is invalid': '两步验证恢复口令无效',
+        'two factor backup code is invalid': '两步验证备用码无效',
         'two factor is not enabled': '两步验证没有启用',
         'two factor has already been enabled': '两步验证已经启用',
-        'two factor recovery code does not exist': '两步验证恢复口令不存在',
+        'two factor backup code does not exist': '两步验证备用码不存在',
     },
     'OK': '确定',
     'Cancel': '取消',
@@ -53,10 +54,13 @@ export default {
     'Unable to login': '无法登录',
     'Two-Factor Authentication': '两步验证',
     'Passcode': '验证码',
+    'Backup Code': '备用码',
     'Verify': '验证',
     'Please input passcode': '请输入验证码',
+    'Please input backup code': '请输入备用码',
     'Unable to verify': '无法验证',
     'Use a backup code': '使用备用码',
+    'Use a passcode': '使用验证码',
     'Language': '语言',
     'Log Out': '退出登录',
     'Are you sure you want to log out?': '您确定是否要退出登录？',