ES如何修改字段里面的值

我ES有个字段叫category,现在里面存的值都是中文,我现在想批量修改,把中文换成英文的,我用aggs 查询语句查询的结果如下

POST testing/_search?size=0

{

  "aggs": {

    "category_stats": {

      "terms": {

        "field": "category",

        "size": 25

      }

    }

  }

}

得到的结果是:
 

{

  "took": 10,

  "timed_out": false,

  "_shards": {

    "total": 5,

    "successful": 5,

    "failed": 0

  },

  "hits": {

    "total": 39597,

    "max_score": 0,

    "hits": []

  },

  "aggregations": {

    "category_stats": {

      "doc_count_error_upper_bound": 0,

      "sum_other_doc_count": 0,

      "buckets": [

        {

          "key": "中餐",

          "doc_count": 10446

        },

        {

          "key": "西餐",

          "doc_count": 6050

        },

        {

          "key": "酒水",

          "doc_count": 4864

        },

        {

          "key": "甜点",

          "doc_count": 4147

        },

        {

          "key": "水果",

          "doc_count": 2963

        },

        {

          "key": "香烟",

          "doc_count": 2422

        },

        .

        .

        .

        .

        .

        

      ]

    }

  }

}

现在有没有什么办法,可以直接在kibana里面操作,直接替换这些中文成英文.例如6050个'西餐'全部替换成'west food'