Add input i18n

src/locales/en/messages.json

@@ -5066,5 +5066,11 @@
   },
   "apiAccessToken": {
     "message": "API Access Token"
+  },
+  "inputRequired": {
+    "message": "Input is required."
+  },
+  "inputEmail": {
+    "message": "Input is not an email-address."
   }
 }