title: Mongoose and localization
body: <p>I want to get your advices about mongoose localization, consider i have two languages "en" and "de", and i have two models like this : </p>
  
  <pre><code>// Schema of Book
  const Book: Schema = new Schema({
      title: { type: String, i18n: true },
  });
  
  Book.plugin(mongooseI18n, {
    locales: ["en", "de"],
  });
  
  export default mongoose.model("Book", CategorySchema);
  
  // Schema of author
  const Author:Schema : new Schema({
      name: { type: String, i18n: true }
  })
  Author.plugin(mongooseI18n, {
    locales: ["en", "de"],
  });
  ...
  </code></pre>
  
  <p>From the documentation this will generate me : {name:{ en : String, de:String }}, till there i understand.
  If i want to reference book to author, how can achieve this? something like this is possible ? : </p>
  
  <pre><code>// Schema of Book
  const Author: Schema = new Schema({
      name: { type: String, i18n: true },
      book:{ type:Object, i18n: true }
  });
  ...
  </code></pre>
  
  <p>Is this will do something like : book : { en:Object, de:Object } ? or have you any idea ? thanks for your help.</p>