title: In Elasticsearch, can I set language-specific multi-fields?
body: <p>Is it possible to use multi-fields to set and query multilingual fields?</p>
  
  <p>Consider this mapping:</p>
  
  <pre><code>PUT multi_test
  {
    "mappings": {
      "data": {
        "_field_names": {
          "enabled": false
        },
        "properties": {
          "book_title": {
            "type": "text",
            "fields": {
              "english": {
                "type": "text",
                "analyzer": "english"
              },
              "german": {
                "type": "text",
                "analyzer": "german"
              },
              "italian": {
                "type": "text",
                "analyzer": "italian"
              }
            }
          }
        }
      }
    }
  }
  </code></pre>
  
  <p>I tried the following, but it doesn't work:</p>
  
  <pre><code>PUT multi_test/data/1
  {
    "book_title.english": "It's good",
    "book_title.german": "Das gut"
  }
  </code></pre>
  
  <p>The error seems to indicate I'm trying to add new fields:</p>
  
  <blockquote>
    <p>{ "error": { "root_cause": [ { "type": "mapper_parsing_exception",
    "reason": "Could not dynamically add mapping for field
    [book_title.english]. Existing mapping for [book_title] must be of
    type object but found [text]." } ], "type":
    "mapper_parsing_exception", "reason": "Could not dynamically add
    mapping for field [book_title.english]. Existing mapping for
    [book_title] must be of type object but found [text]." }, "status":
    400 }</p>
  </blockquote>
  
  <p>What am I doing wrong here?</p>
  
  <p>If my approach is unworkable, what is a better way to do this?</p>