# Problem with icu\_normalizer and acute accent

**URL:** <https://discuss.elastic.co/t/problem-with-icu-normalizer-and-acute-accent/89450>\
**Category:** Elasticsearch\
**Created:** [June 14, 2017, 7:57pm UTC](https://discuss.elastic.co/t/problem-with-icu-normalizer-and-acute-accent/89450 "2017-06-14T19:57:51Z")\
**Posts on this page:** 4\
**Page:** 1

<div class="post-metadata">

**Author:** ![mconsoni](https://avatars.discourse-cdn.com/v4/letter/m/c5a1d2/32.png) [@mconsoni](https://discuss.elastic.co/u/mconsoni)\
**Post date:** [June 14, 2017, 7:57pm UTC](https://discuss.elastic.co/t/problem-with-icu-normalizer-and-acute-accent/89450/1 "2017-06-14T19:57:51Z")

</div>

Hi!

I'm having an issue with `icu_normalizer` and acute accents and I don't know if it's something I'm not seeing, a bug, a misconfiguration or what. I'm very new with ES.

I have an analyzer using a char\_filter based on `icu_normalizer` and type `nfkc`.

Testing the analyzer, the acute accents are merged with the following character. Then I can search the documents with the original text, but not filter them.

I tested it with ES 1.7 in Debian and 5.4.1 in OSX, both with java 1.8.

A document with an attribute using acute accent is created, when I do a search, it is returned:

```auto
{
        "query": {
                "match": {
                        "photo.location.exact": {
                                "query": "Li´ege"
                        }
                }
        }
}

```

But when I try to filter by the original string, it's not returned:

```auto
{
    "size": 1000,
    "from": 0,
    "query": {
        "filtered": {
            "query": {
                "bool": {
                    "minimum_should_match": 1,
                    "must": [
                        {
                            "terms": {
                                "photo.location.exact": [
                                    "NY",
                                    "París",
                                    "Li´ege"
                                ]
                            }
                        }
                    ]
                }
            }
        }
    }
}

```

If I change `Li´ege` with the text returned by analyzing it, the document is returned.

My index:

```auto
{
  "documents": {
    "aliases": {},
    "mappings": {},
    "settings": {
      "index": {
        "number_of_shards": "5",
        "provided_name": "documents",
        "creation_date": "1497468479974",
        "analysis": {
          "filter": {
            "truncate_field": {
              "length": "1000",
              "type": "truncate"
            }
          },
          "analyzer": {
            "exact_analyzer": {
              "filter": [
                "truncate_field"
              ],
              "char_filter": "nfkc_normalizer",
              "type": "custom",
              "tokenizer": "keyword"
            }
          },
          "char_filter": {
            "nfkc_normalizer": {
              "name": "nfkc",
              "type": "icu_normalizer"
            }
          }
        },
        "number_of_replicas": "1",
        "uuid": "eeDA54FiQJ2FGq3tSVRfnQ",
        "version": {
          "created": "5040199"
        }
      }
    }
  }
}

```

I wrote a Python script which create the index, populate the DB with 3 documents and do the searchs, it can be downloaded from [here](http://www.openideas.com.ar/replicateIssueES.py).

What am I doing wrong?

Thanks!!!

---

<div class="post-metadata">

**Author:** ![mconsoni](https://avatars.discourse-cdn.com/v4/letter/m/c5a1d2/32.png) [@mconsoni](https://discuss.elastic.co/u/mconsoni)\
**Post date:** [June 14, 2017, 7:59pm UTC](https://discuss.elastic.co/t/problem-with-icu-normalizer-and-acute-accent/89450/2 "2017-06-14T19:59:18Z")

</div>

One more thing; using `nfc` instead of `nfck`, everything works right. Why?

---

<div class="post-metadata">

**Author:** ![mconsoni](https://avatars.discourse-cdn.com/v4/letter/m/c5a1d2/32.png) [@mconsoni](https://discuss.elastic.co/u/mconsoni)\
**Post date:** [June 22, 2017, 3:02pm UTC](https://discuss.elastic.co/t/problem-with-icu-normalizer-and-acute-accent/89450/3 "2017-06-22T15:02:33Z")

</div>

Any clue?

---

<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:** [July 20, 2017, 3:02pm UTC](https://discuss.elastic.co/t/problem-with-icu-normalizer-and-acute-accent/89450/4 "2017-07-20T15:02:55Z")

</div>

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