Supported languages for Atomic, Headless, and Quantic

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Important
Language support and relevance disclaimer

The Coveo Platform supports a wide range of languages across indexing, machine learning models, and user interfaces; however, the depth of linguistic processing varies by language. Support for a language doesn’t constitute a commitment to equivalent relevance, accuracy, or feature parity.

For example, queries and indexed content in languages such as English, French, German, and Spanish achieve higher and more consistent relevance due to more comprehensive language analysis and optimized platform components. Conversely, for other languages that are technically supported but for which the platform isn’t fully optimized, search relevance, generated answers, and overall accuracy can be reduced or be less consistent. Accordingly, language support doesn’t guarantee equal relevance quality, and observed outcomes can vary depending on the language.

The following sections outline the languages supported by the modern Coveo UI libraries (Atomic, Headless, and Quantic) for building search and commerce interfaces.

Atomic

The Coveo Atomic library includes built-in UI translations for the following languages. You can also add or override translations for any language using the i18next framework. For more information, see Localization.

Important
Disclaimer

Many of the language strings were created using a generative AI model, so there may be some inaccuracies in the translations.

To contribute improved language strings, submit changes to the locales.json file.
Language Locale Atomic UI support

English

en

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French

fr

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German

de

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Spanish

es

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Czech

cs

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Danish

da

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Dutch

nl

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Finnish

fi

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Greek

el

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Hungarian

hu

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Indonesian

id

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Italian

it

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Japanese

ja

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Korean

ko

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Norwegian

no

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Polish

pl

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Portuguese

pt

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Portuguese (Brazil)

pt-BR

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Russian

ru

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Swedish

sv

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Thai

th

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Turkish

tr

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Chinese (Simplified)

zh-CN

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Chinese (Traditional)

zh-TW

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Chinese

zh

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Headless

The Coveo Headless library is locale-agnostic. It accepts any BCP 47-compliant locale string through its engine configuration and forwards it to the Coveo Platform APIs.

As a state management library, Headless doesn’t include bundled UI translations. The locale you specify is used by the Coveo Platform for language-aware processing such as stemming, language detection, and query pipeline locale conditions.

Therefore, Headless supports all languages that the Coveo Platform supports. See Supported languages for indexing features for the full list.

Quantic

The Coveo Quantic library uses Salesforce Custom Labels for its UI strings. Quantic ships with built-in translations for:

  • English

  • French

  • Spanish

To support additional languages, use the Salesforce Translation Workbench to translate the Quantic Custom Labels (prefixed with quantic_) into any language that Salesforce supports. Quantic components automatically render in the user’s configured Salesforce language.