Fix MM-57090 (#26589)

server/i18n/en.json

@@ -4066,6 +4066,14 @@
     "id": "api.user.add_user_to_group_syncables.not_ldap_user.app_error",
     "translation": "not an ldap user"
   },
+  {
+    "id": "api.user.auth_switch.not_available.email_signup_disabled.app_error",
+    "translation": "Authentication Transfer is not available as email signup is disabled."
+  },
+  {
+    "id": "api.user.auth_switch.not_available.login_disabled.app_error",
+    "translation": "Authentication Transfer is not available as neither email login nor username login is enabled."
+  },
   {
     "id": "api.user.authorize_oauth_user.bad_response.app_error",
     "translation": "Bad response from token request."