> ## Documentation Index
> Fetch the complete documentation index at: https://algolia.com/llms.txt
> Use this file to discover all available pages before exploring further.

# naturalLanguages

> Languages for which to change settings to support natural language searching

export const Setting = ({type, default: defaultValue, defaultNote, scope, min, max, formerly}) => {
  const renderedDefault = defaultValue === '' ? '""' : defaultValue;
  const renderedNote = defaultNote ? `(${defaultNote})` : '';
  return <ul>
      <li><strong>Type:</strong> <code>{type}</code></li>
      <li><strong>Default:</strong> <code>{renderedDefault}</code>{renderedNote}</li>
      {min && <li><strong>Min:</strong> <code>{min}</code></li>}
      {max && <li><strong>Max:</strong> <code>{max}</code></li>}
      <li><strong>Scope:</strong> <a href="/doc/api-reference/api-parameters"><code>{scope}</code></a></li>
      {formerly && <li>
          <strong>Deprecated name:</strong> <code>{formerly}</code>
        </li>}
    </ul>;
};

<Setting type="list<enum<string>>" default="[]" scope="search" />

The `naturalLanguages` parameter enables behaviors optimized for natural language input—such as voice queries or full-sentence searches—rather than keyword-based input.

Setting `naturalLanguages` automatically changes the following parameters:

* [`removeStopWords`](/doc/api-reference/api-parameters/removeStopWords) and [`ignorePlurals`](/doc/api-reference/api-parameters/ignorePlurals) are set to the specified languages.
* [`removeWordsIfNoResults`](/doc/api-reference/api-parameters/removeWordsIfNoResults) is set to `allOptional`.
* The value `"natural_language"` is added to both:
  * [`ruleContexts`](/doc/api-reference/api-parameters/ruleContexts)
  * [`analyticsTags`](/doc/api-reference/api-parameters/analyticsTags)

## Usage

* Only include languages that are present in your dataset to avoid unintended matches.
* For a list of supported language ISO codes, see [Supported languages](/doc/guides/managing-results/optimize-search-results/handling-natural-languages-nlp/in-depth/supported-languages).

## Example

<AccordionGroup>
  <Accordion title="Current API clients" defaultOpen="true">
    <CodeGroup>
      ```cs C# theme={"system"}
      var response = await client.SearchSingleIndexAsync<Hit>(
        "INDEX_NAME",
        new SearchParams(
          new SearchParamsObject
          {
            Query = "",
            NaturalLanguages = new List<SupportedLanguage> { Enum.Parse<SupportedLanguage>("Fr") },
          }
        )
      );
      ```

      ```dart Dart theme={"system"}
      final response = await client.searchSingleIndex(
        indexName: "INDEX_NAME",
        searchParams: SearchParamsObject(
          query: "",
          naturalLanguages: [
            SupportedLanguage.fromJson("fr"),
          ],
        ),
      );
      ```

      ```go Go theme={"system"}
      response, err := client.SearchSingleIndex(client.NewApiSearchSingleIndexRequest(
        "INDEX_NAME").WithSearchParams(search.SearchParamsObjectAsSearchParams(
        search.NewEmptySearchParamsObject().SetQuery("").SetNaturalLanguages(
          []search.SupportedLanguage{search.SupportedLanguage("fr")}))))
      if err != nil {
        // handle the eventual error
        panic(err)
      }
      ```

      ```java Java theme={"system"}
      SearchResponse response = client.searchSingleIndex(
        "INDEX_NAME",
        new SearchParamsObject().setQuery("").setNaturalLanguages(Arrays.asList(SupportedLanguage.FR)),
        Hit.class
      );
      ```

      ```js JavaScript theme={"system"}
      const response = await client.searchSingleIndex({
        indexName: 'indexName',
        searchParams: { query: '', naturalLanguages: ['fr'] },
      });
      ```

      ```kotlin Kotlin theme={"system"}
      var response =
        client.searchSingleIndex(
          indexName = "INDEX_NAME",
          searchParams =
            SearchParamsObject(
              query = "",
              naturalLanguages = listOf(SupportedLanguage.entries.first { it.value == "fr" }),
            ),
        )
      ```

      ```php PHP theme={"system"}
      $response = $client->searchSingleIndex(
          'INDEX_NAME',
          ['query' => '',
              'naturalLanguages' => [
                  'fr',
              ],
          ],
      );
      ```

      ```python Python theme={"system"}
      response = client.search_single_index(
          index_name="INDEX_NAME",
          search_params={
              "query": "",
              "naturalLanguages": [
                  "fr",
              ],
          },
      )
      ```

      ```ruby Ruby theme={"system"}
      response = client.search_single_index(
        "INDEX_NAME",
        Algolia::Search::SearchParamsObject.new(query: "", natural_languages: ["fr"])
      )
      ```

      ```scala Scala theme={"system"}
      val response = Await.result(
        client.searchSingleIndex(
          indexName = "INDEX_NAME",
          searchParams = Some(
            SearchParamsObject(
              query = Some(""),
              naturalLanguages = Some(Seq(SupportedLanguage.withName("fr")))
            )
          )
        ),
        Duration(100, "sec")
      )
      ```

      ```swift Swift theme={"system"}
      let response: SearchResponse<Hit> = try await client.searchSingleIndex(
          indexName: "INDEX_NAME",
          searchParams: SearchSearchParams.searchSearchParamsObject(SearchSearchParamsObject(
              query: "",
              naturalLanguages: [SearchSupportedLanguage.fr]
          ))
      )
      ```
    </CodeGroup>
  </Accordion>

  <Accordion title="Legacy API clients">
    <CodeGroup>
      ```cs C# theme={"system"}
      index.Search(new Query("")
      {
          NaturalLanguages = new List { "fr" }
      });
      ```

      ```go Go theme={"system"}
      res, err := index.Search(
        "",
        opt.NaturalLanguages("fr")
      )
      ```

      ```java Java theme={"system"}
      index.search(
        new Query("").setNaturalLanguages(Collections.singletonList("fr"));
      ```

      ```js JavaScript theme={"system"}
      index
        .search("", {
          naturalLanguages: ["fr"],
        })
        .then(({ hits }) => {
          console.log(hits);
        });
      ```

      ```kotlin Kotlin theme={"system"}
      val query = query("") {
          naturalLanguages {
              +French
          }
      }

      index.search(query)
      ```

      ```php PHP theme={"system"}
      $index->search('', [
        'naturalLanguages' => ['fr']
      ]);
      ```

      ```python Python theme={"system"}
      index.search("", {"naturalLanguages": ["fr"]})
      ```

      ```ruby Ruby theme={"system"}
      index.search(
        "",
        {
          naturalLanguages: ["fr"]
        }
      )
      ```

      ```scala Scala theme={"system"}
      client.execute {
        search into "myIndex" query Query(
          query = Some(""),
          naturalLanguages = Some(Seq("fr"))
        )
      }
      ```

      ```swift Swift theme={"system"}
      let query = Query("query")
        .set(\.naturalLanguages, to: [.french])

      index.search(query: query) { result in
        if case .success(let response) = result {
          print("Response: \(response)")
        }
      }
      ```
    </CodeGroup>
  </Accordion>
</AccordionGroup>