OpenSearch/docs/reference/analysis/analyzers/lang-analyzer.asciidoc

[[analysis-lang-analyzer]]
=== Language Analyzers

A set of analyzers aimed at analyzing specific language text. The
following types are supported:
<<arabic-analyzer,`arabic`>>,
<<armenian-analyzer,`armenian`>>,
<<basque-analyzer,`basque`>>,
<<brazilian-analyzer,`brazilian`>>,
<<bulgarian-analyzer,`bulgarian`>>,
<<catalan-analyzer,`catalan`>>,
<<chinese-analyzer,`chinese`>>,
<<cjk-analyzer,`cjk`>>,
<<czech-analyzer,`czech`>>,
<<danish-analyzer,`danish`>>,
<<dutch-analyzer,`dutch`>>,
<<english-analyzer,`english`>>,
<<finnish-analyzer,`finnish`>>,
<<french-analyzer,`french`>>,
<<galician-analyzer,`galician`>>,
<<german-analyzer,`german`>>,
<<greek-analyzer,`greek`>>,
<<hindi-analyzer,`hindi`>>,
<<hungarian-analyzer,`hungarian`>>,
<<indonesian-analyzer,`indonesian`>>,
<<italian-analyzer,`italian`>>,
<<norwegian-analyzer,`norwegian`>>,
<<persian-analyzer,`persian`>>,
<<portuguese-analyzer,`portuguese`>>,
<<romanian-analyzer,`romanian`>>,
<<russian-analyzer,`russian`>>,
<<spanish-analyzer,`spanish`>>,
<<swedish-analyzer,`swedish`>>,
<<turkish-analyzer,`turkish`>>,
<<thai-analyzer,`thai`>>.

All analyzers support setting custom `stopwords` either internally in
the config, or by using an external stopwords file by setting
`stopwords_path`. Check <<analysis-stop-analyzer,Stop Analyzer>> for
more details.

The following analyzers support setting custom `stem_exclusion` list:
`arabic`, `armenian`, `basque`, `catalan`, `bulgarian`, `catalan`,
`czech`, `finnish`, `dutch`, `english`, `finnish`, `french`, `galician`,
`german`, `hindi`, `hungarian`, `indonesian`, `italian`, `norwegian`,
`portuguese`, `romanian`, `russian`, `spanish`, `swedish`, `turkish`.

[[arabic-analyzer]]
==== `arabic` analyzer

The `arabic` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "arabic_stop": {
          "type":       "stop",
          "stopwords":  "_arabic_" <1>
        },
        "arabic_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "arabic_stemmer": {
          "type":       "stemmer",
          "language":   "arabic"
        }
      },
      "analyzer": {
        "arabic": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "arabic_stop",
            "arabic_normalization",
            "arabic_keywords",
            "arabic_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[armenian-analyzer]]
==== `armenian` analyzer

The `armenian` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "armenian_stop": {
          "type":       "stop",
          "stopwords":  "_armenian_" <1>
        },
        "armenian_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "armenian_stemmer": {
          "type":       "stemmer",
          "language":   "armenian"
        }
      },
      "analyzer": {
        "armenian": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "armenian_stop",
            "armenian_keywords",
            "armenian_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[basque-analyzer]]
==== `basque` analyzer

The `basque` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "basque_stop": {
          "type":       "stop",
          "stopwords":  "_basque_" <1>
        },
        "basque_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "basque_stemmer": {
          "type":       "stemmer",
          "language":   "basque"
        }
      },
      "analyzer": {
        "basque": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "basque_stop",
            "basque_keywords",
            "basque_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[brazilian-analyzer]]
==== `brazilian` analyzer

The `brazilian` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "brazilian_stop": {
          "type":       "stop",
          "stopwords":  "_brazilian_" <1>
        },
        "brazilian_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "brazilian_stemmer": {
          "type":       "stemmer",
          "language":   "brazilian"
        }
      },
      "analyzer": {
        "brazilian": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "brazilian_stop",
            "brazilian_keywords",
            "brazilian_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[bulgarian-analyzer]]
==== `bulgarian` analyzer

The `bulgarian` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "bulgarian_stop": {
          "type":       "stop",
          "stopwords":  "_bulgarian_" <1>
        },
        "bulgarian_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "bulgarian_stemmer": {
          "type":       "stemmer",
          "language":   "bulgarian"
        }
      },
      "analyzer": {
        "bulgarian": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "bulgarian_stop",
            "bulgarian_keywords",
            "bulgarian_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[catalan-analyzer]]
==== `catalan` analyzer

The `catalan` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "catalan_elision": {
        "type":         "elision",
            "articles": [ "d", "l", "m", "n", "s", "t"]
        },
        "catalan_stop": {
          "type":       "stop",
          "stopwords":  "_catalan_" <1>
        },
        "catalan_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "catalan_stemmer": {
          "type":       "stemmer",
          "language":   "catalan"
        }
      },
      "analyzer": {
        "catalan": {
          "tokenizer":  "standard",
          "filter": [
            "catalan_elision",
            "lowercase",
            "catalan_stop",
            "catalan_keywords",
            "catalan_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[chinese-analyzer]]
==== `chinese` analyzer

The `chinese` analyzer cannot be reimplemented as a `custom` analyzer
because it depends on the ChineseTokenizer and ChineseFilter classes,
which are not exposed in Elasticsearch.  These classes are
deprecated in Lucene 4 and the `chinese` analyzer will be replaced
with the <<analysis-standard-analyzer>> in Lucene 5.

[[cjk-analyzer]]
==== `cjk` analyzer

The `cjk` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "english_stop": {
          "type":       "stop",
          "stopwords":  "_english_" <1>
        }
      },
      "analyzer": {
        "cjk": {
          "tokenizer":  "standard",
          "filter": [
            "cjk_width"
            "lowercase",
            "cjk_bigram",
            "english_stop"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.

[[czech-analyzer]]
==== `czech` analyzer

The `czech` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "czech_stop": {
          "type":       "stop",
          "stopwords":  "_czech_" <1>
        },
        "czech_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "czech_stemmer": {
          "type":       "stemmer",
          "language":   "czech"
        }
      },
      "analyzer": {
        "czech": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "czech_stop",
            "czech_keywords",
            "czech_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[danish-analyzer]]
==== `danish` analyzer

The `danish` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "danish_stop": {
          "type":       "stop",
          "stopwords":  "_danish_" <1>
        },
        "danish_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "danish_stemmer": {
          "type":       "stemmer",
          "language":   "danish"
        }
      },
      "analyzer": {
        "danish": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "danish_stop",
            "danish_keywords",
            "danish_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[dutch-analyzer]]
==== `dutch` analyzer

The `dutch` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "dutch_stop": {
          "type":       "stop",
          "stopwords":  "_dutch_" <1>
        },
        "dutch_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "dutch_stemmer": {
          "type":       "stemmer",
          "language":   "dutch"
        },
        "dutch_override": {
          "type":       "stemmer_override",
          "rules": [
            "fiets=>fiets",
            "bromfiets=>bromfiets",
            "ei=>eier",
            "kind=>kinder"
          ]
        }
      },
      "analyzer": {
        "dutch": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "dutch_stop",
            "dutch_keywords",
            "dutch_override",
            "dutch_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[english-analyzer]]
==== `english` analyzer

The `english` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "english_stop": {
          "type":       "stop",
          "stopwords":  "_english_" <1>
        },
        "english_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "english_stemmer": {
          "type":       "stemmer",
          "language":   "english"
        },
        "english_possessive_stemmer": {
          "type":       "stemmer",
          "language":   "possessive_english"
        }
      },
      "analyzer": {
        "english": {
          "tokenizer":  "standard",
          "filter": [
            "english_possessive_stemmer",
            "lowercase",
            "english_stop",
            "english_keywords",
            "english_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[finnish-analyzer]]
==== `finnish` analyzer

The `finnish` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "finnish_stop": {
          "type":       "stop",
          "stopwords":  "_finnish_" <1>
        },
        "finnish_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "finnish_stemmer": {
          "type":       "stemmer",
          "language":   "finnish"
        }
      },
      "analyzer": {
        "finnish": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "finnish_stop",
            "finnish_keywords",
            "finnish_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[french-analyzer]]
==== `french` analyzer

The `french` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "french_elision": {
        "type":         "elision",
            "articles": [ "l", "m", "t", "qu", "n", "s",
                          "j", "d", "c", "jusqu", "quoiqu",
                          "lorsqu", "puisqu"
                        ]
        },
        "french_stop": {
          "type":       "stop",
          "stopwords":  "_french_" <1>
        },
        "french_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "french_stemmer": {
          "type":       "stemmer",
          "language":   "light_french"
        }
      },
      "analyzer": {
        "french": {
          "tokenizer":  "standard",
          "filter": [
            "french_elision",
            "lowercase",
            "french_stop",
            "french_keywords",
            "french_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[galician-analyzer]]
==== `galician` analyzer

The `galician` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "galician_stop": {
          "type":       "stop",
          "stopwords":  "_galician_" <1>
        },
        "galician_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "galician_stemmer": {
          "type":       "stemmer",
          "language":   "galician"
        }
      },
      "analyzer": {
        "galician": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "galician_stop",
            "galician_keywords",
            "galician_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[german-analyzer]]
==== `german` analyzer

The `german` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "german_stop": {
          "type":       "stop",
          "stopwords":  "_german_" <1>
        },
        "german_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "german_stemmer": {
          "type":       "stemmer",
          "language":   "light_german"
        }
      },
      "analyzer": {
        "german": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "german_stop",
            "german_keywords",
            "ascii_folding", <3>
            "german_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.
<3> The `german` analyzer actually uses the GermanNormalizationFilter,
    which isn't exposed in Elasticsearch.  The `ascii_folding` filter
    does a similar job but is more extensive.

[[greek-analyzer]]
==== `greek` analyzer

The `greek` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "greek_stop": {
          "type":       "stop",
          "stopwords":  "_greek_" <1>
        },
        "greek_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "greek_stemmer": {
          "type":       "stemmer",
          "language":   "greek"
        }
      },
      "analyzer": {
        "greek": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "greek_stop",
            "greek_keywords",
            "greek_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[hindi-analyzer]]
==== `hindi` analyzer

The `hindi` analyzer cannot currently be implemented as a `custom` analyzer
as it depends on the IndicNormalizationFilter and HindiNormalizationFilter
which are not yet exposed by Elasticsearch. Instead, see the <<analysis-icu-plugin>>.

[[hungarian-analyzer]]
==== `hungarian` analyzer

The `hungarian` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "hungarian_stop": {
          "type":       "stop",
          "stopwords":  "_hungarian_" <1>
        },
        "hungarian_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "hungarian_stemmer": {
          "type":       "stemmer",
          "language":   "hungarian"
        }
      },
      "analyzer": {
        "hungarian": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "hungarian_stop",
            "hungarian_keywords",
            "hungarian_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.


[[indonesian-analyzer]]
==== `indonesian` analyzer

The `indonesian` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "indonesian_stop": {
          "type":       "stop",
          "stopwords":  "_indonesian_" <1>
        },
        "indonesian_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "indonesian_stemmer": {
          "type":       "stemmer",
          "language":   "indonesian"
        }
      },
      "analyzer": {
        "indonesian": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "indonesian_stop",
            "indonesian_keywords",
            "indonesian_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[italian-analyzer]]
==== `italian` analyzer

The `italian` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "italian_elision": {
        "type":         "elision",
            "articles": [
                "c", "l", "all", "dall", "dell",
                "nell", "sull", "coll", "pell",
                "gl", "agl", "dagl", "degl", "negl",
                "sugl", "un", "m", "t", "s", "v", "d"
            ]
        },
        "italian_stop": {
          "type":       "stop",
          "stopwords":  "_italian_" <1>
        },
        "italian_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "italian_stemmer": {
          "type":       "stemmer",
          "language":   "light_italian"
        }
      },
      "analyzer": {
        "italian": {
          "tokenizer":  "standard",
          "filter": [
            "italian_elision",
            "lowercase",
            "italian_stop",
            "italian_keywords",
            "italian_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[norwegian-analyzer]]
==== `norwegian` analyzer

The `norwegian` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "norwegian_stop": {
          "type":       "stop",
          "stopwords":  "_norwegian_" <1>
        },
        "norwegian_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "norwegian_stemmer": {
          "type":       "stemmer",
          "language":   "norwegian"
        }
      },
      "analyzer": {
        "norwegian": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "norwegian_stop",
            "norwegian_keywords",
            "norwegian_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[persian-analyzer]]
==== `persian` analyzer

The `persian` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "char_filter": {
        "zero_width_spaces": {
            "type":       "mapping",
            "mappings": [ "\\u200C=> "] <1>
        }
      },
      "filter": {
        "persian_stop": {
          "type":       "stop",
          "stopwords":  "_persian_" <2>
        }
      },
      "analyzer": {
        "persian": {
          "tokenizer":     "standard",
          "char_filter": [ "zero_width_spaces" ]
          "filter": [
            "lowercase",
            "arabic_normalization",
            "persian_normalization",
            "persian_stop"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> Replaces zero-width non-joiners with an ASCII space.
<2> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.

[[portuguese-analyzer]]
==== `portuguese` analyzer

The `portuguese` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "portuguese_stop": {
          "type":       "stop",
          "stopwords":  "_portuguese_" <1>
        },
        "portuguese_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "portuguese_stemmer": {
          "type":       "stemmer",
          "language":   "light_portuguese"
        }
      },
      "analyzer": {
        "portuguese": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "portuguese_stop",
            "portuguese_keywords",
            "portuguese_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[romanian-analyzer]]
==== `romanian` analyzer

The `romanian` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "romanian_stop": {
          "type":       "stop",
          "stopwords":  "_romanian_" <1>
        },
        "romanian_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "romanian_stemmer": {
          "type":       "stemmer",
          "language":   "romanian"
        }
      },
      "analyzer": {
        "romanian": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "romanian_stop",
            "romanian_keywords",
            "romanian_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.


[[russian-analyzer]]
==== `russian` analyzer

The `russian` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "russian_stop": {
          "type":       "stop",
          "stopwords":  "_russian_" <1>
        },
        "russian_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "russian_stemmer": {
          "type":       "stemmer",
          "language":   "russian"
        }
      },
      "analyzer": {
        "russian": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "russian_stop",
            "russian_keywords",
            "russian_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[spanish-analyzer]]
==== `spanish` analyzer

The `spanish` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "spanish_stop": {
          "type":       "stop",
          "stopwords":  "_spanish_" <1>
        },
        "spanish_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "spanish_stemmer": {
          "type":       "stemmer",
          "language":   "light_spanish"
        }
      },
      "analyzer": {
        "spanish": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "spanish_stop",
            "spanish_keywords",
            "spanish_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[swedish-analyzer]]
==== `swedish` analyzer

The `swedish` analyzer could be reimplemented as a `custom` analyzer as follows:

[source,js]
----------------------------------------------------
{
  "settings": {
    "analysis": {
      "filter": {
        "swedish_stop": {
          "type":       "stop",
          "stopwords":  "_swedish_" <1>
        },
        "swedish_keywords": {
          "type":       "keyword_marker",
          "keywords":   [] <2>
        },
        "swedish_stemmer": {
          "type":       "stemmer",
          "language":   "swedish"
        }
      },
      "analyzer": {
        "swedish": {
          "tokenizer":  "standard",
          "filter": [
            "lowercase",
            "swedish_stop",
            "swedish_keywords",
            "swedish_stemmer"
          ]
        }
      }
    }
  }
}
----------------------------------------------------
<1> The default stopwords can be overridden with the `stopwords`
    or `stopwords_path` parameters.
<2> Words can be excluded from stemming with the `stem_exclusion`
    parameter.

[[turkish-analyzer]]
==== `turkish` analyzer

The `turkish` analyzer cannot currently be implemented as a `custom` analyzer
because it depends on the TurkishLowerCaseFilter and the ApostropheFilter
which are not exposed in Elasticsearch. Instead, see the <<analysis-icu-plugin>>.

[[thai-analyzer]]
==== `thai` analyzer

The `thai` analyzer cannot currently be implemented as a `custom` analyzer
because it depends on the ThaiTokenizer which is not exposed in Elasticsearch.
Instead, see the <<analysis-icu-plugin>>.