title: How to represent JSONSchema of JSON which key names are in enum value?
body: <p>I create my own JSON format file like this:</p>
  
  <pre><code>{
    "title": {
      "ja": "ドラえもん",
      "en": "Doraemon",
      "ko": "도라에몽",
      "de": #Any other languages...
    }
  }
  </code></pre>
  
  <p>I want to create JSONSchema of this JSON, but how should I represent such kind of ("ja", "en", "ko", ...) free or enum value JSON keys?</p>