# Chinese Analyzer: Simplified and Traditional (stconvert)

**URL:** <https://discuss.elastic.co/t/chinese-analyzer-simplified-and-traditional-stconvert/297812>\
**Category:** Elasticsearch\
**Created:** [February 21, 2022, 9:07pm UTC](https://discuss.elastic.co/t/chinese-analyzer-simplified-and-traditional-stconvert/297812 "2022-02-21T21:07:01Z")\
**Posts on this page:** 3\
**Page:** 1

<div class="post-metadata">

**Author:** ![Karuna](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/karuna/32/97903_2.png) [@Karuna](https://discuss.elastic.co/u/Karuna)\
**Post date:** [February 21, 2022, 9:07pm UTC](https://discuss.elastic.co/t/chinese-analyzer-simplified-and-traditional-stconvert/297812/1 "2022-02-21T21:07:01Z")

</div>

I'm creating a search engine for my non-profit org that uses 21 languages, so I also need to support traditional and simplified Chinese as these are our second largest set of readers.

I have read a few articles ([你们好 - Elasticsearch and the Chinese language | mimacom](https://blog.mimacom.com/elasticsearch-chinese-language/)) and it seems I need to use `stconvert` as traditional Chinese is not supported in Elasticsearch.

I am also using `smartcn` for simplified Chinese... these plugins are both on the recommended list ([Analysis Plugins | Elasticsearch Plugins and Integrations [8.0] | Elastic](https://www.elastic.co/guide/en/elasticsearch/plugins/current/analysis.html)) and I have them both installed correctly on elastic cloud.

However, I'm confused about how to use `stconvert` with `smartcn`, as I understand it the `stconvert` plugin only converts traditional Chinese charters to simplified Chinese and back.

I can create the demo `stconvert` index and get the plugin working:

```auto
PUT /stconvert/
{
  "settings": {
    "analysis": {
      "analyzer": {
        "tsconvert": {
          "tokenizer": "tsconvert"
        }
      },
      "tokenizer": {
        "tsconvert": {
          "type": "stconvert",
          "delimiter": "#",
          "keep_both": false,
          "convert_type": "t2s"
        }
      },
      "filter": {
        "tsconvert": {
          "type": "stconvert",
          "delimiter": "#",
          "keep_both": false,
          "convert_type": "t2s"
        }
      },
      "char_filter": {
        "tsconvert": {
          "type": "stconvert",
          "convert_type": "t2s"
        }
      }
    }
  }
}

```

But when I create the actual traditional Chinese index, I still want to use the `smartcn` analyser:

```auto
PUT /zh-traditional/
{
  "settings": {
    "analysis": {
      "analyzer": "smartcn"
    }
  }
}

```

Is there anyone that can help me link the two together? I can't find any instructions or help on how to use the two plugins together, or do I just need to use the `stconvert` analyser only and it'll use the native Chinese search in the background? From my research it seems the best search experience is provided by using both plugins but I can't figure out how to use them together.

Any help would be appreciated.

---

<div class="post-metadata">

**Author:** ![Karuna](https://sea2.discourse-cdn.com/elastic/user_avatar/discuss.elastic.co/karuna/32/97903_2.png) [@Karuna](https://discuss.elastic.co/u/Karuna)\
**Post date:** [February 28, 2022, 2:20pm UTC](https://discuss.elastic.co/t/chinese-analyzer-simplified-and-traditional-stconvert/297812/2 "2022-02-28T14:20:24Z")

</div>

This is my work-in-progress answer but I'm still doing some testing and trying to understand how it all works:

```auto
PUT /zh-traditional/
{
  "settings": {
    "analysis": {
      "analyzer": {
        "rebuilt_smartcn": {
          "tokenizer": "smartcn_tokenizer",
          "filter": [
            "lowercase",
            "porter_stem",
            "smartcn_stop"
          ],
          "char_filter": [
            "tsconvert"
          ]
        }
      },
      "filter": {
        "tsconvert": {
          "type": "stconvert",
          "keep_both": false,
          "convert_type": "t2s"
        }
      },
      "char_filter": {
        "tsconvert": {
          "type": "stconvert",
          "keep_both": false,
          "convert_type": "t2s"
        }
      }
    }
  }
}

```

---

<div class="post-metadata">

**Author:** ![system](https://us1.discourse-cdn.com/elastic/original/3X/1/a/1ac57faf039f6b580b3f104ef42a2a89e41014de.png) [@system](https://discuss.elastic.co/u/system)\
**Post date:** [March 28, 2022, 2:21pm UTC](https://discuss.elastic.co/t/chinese-analyzer-simplified-and-traditional-stconvert/297812/3 "2022-03-28T14:21:05Z")

</div>

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