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The indexLanguages parameter specifies the languages of your indexed content. This allows Algolia to apply language-specific processing such as tokenization, normalization, and filtering at indexing time. For a list of supported language ISO code, see Supported languages.

Usage

  • Always set both indexLanguages and queryLanguages to ensure consistent processing between indexing and search.
  • If indexLanguages isn’t set:
    • Algolia uses the value of ignorePlurals or removeStopWords, if defined
    • Otherwise, it applies all supported language configurations, which may lead to unexpected results

Example

Current API clients

Last modified on May 19, 2026