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title: "Language & Translations"
metaTitle: "Multi-Language Content and Translations in Vendure"
metaDescription: "How Vendure handles multi-language content using the Translatable entity pattern, channel language settings, and API language resolution."
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Vendure has built-in support for multi-language content, allowing you to serve a fully localized storefront
without any third-party translation services. The approach is based on a **Translatable entity pattern**,
where translatable fields are stored in a dedicated translations relation rather than directly on the entity.

## The Translatable entity pattern

Entities that support multiple languages implement the `Translatable` interface. Instead of storing fields
like `name` or `description` directly, these entities hold a `translations` array. Each entry in that array
is linked to a specific [`LanguageCode`](/current/core/reference/typescript-api/common/language-code/) and contains the
localized values for that language.

This means a single Product can carry an English name, a German name, and a French name all at the same time,
each stored as a separate translation row in the database.

## Which entities are translatable?

The following core entities use the Translatable pattern:

* [`Product`](/current/core/reference/typescript-api/entities/product/)
* [`ProductVariant`](/current/core/reference/typescript-api/entities/product-variant/)
* [`Collection`](/current/core/reference/typescript-api/entities/collection/)
* [`Facet`](/current/core/reference/typescript-api/entities/facet/)
* [`FacetValue`](/current/core/reference/typescript-api/entities/facet-value/)
* [`PaymentMethod`](/current/core/reference/typescript-api/entities/payment-method/)
* [`ShippingMethod`](/current/core/reference/typescript-api/entities/shipping-method/)
* [`Country`](/current/core/reference/typescript-api/entities/country/)
* [`Province`](/current/core/reference/typescript-api/entities/province/)
* [`Zone`](/current/core/reference/typescript-api/entities/zone/)

Plugins can also define their own translatable custom entities using the same pattern.

## Channel language settings

Each [Channel](/current/core/core-concepts/channels/) is configured with two language-related properties:

* **`availableLanguageCodes`** — the set of languages that this channel supports.
* **`defaultLanguageCode`** — the language used when no explicit language is requested.

These settings determine which translations are expected to exist for entities within that channel, and
which language the API falls back to when a requested translation is not available.

## How the API resolves language

When a client makes a GraphQL API request, Vendure determines the language to use via the `languageCode`
query parameter. For example, appending `?languageCode=de` to the API URL will cause the response to
return German translations where available.

If no `languageCode` parameter is provided, the channel's `defaultLanguageCode` is used. If a translation
for the requested language does not exist on a given entity, Vendure falls back to the default language
translation.

This resolution happens transparently — the API consumer always receives a flat object with the translated
fields, rather than the underlying translations array.

## Custom field translations

The Translatable pattern extends to [custom fields](/current/core/developer-guide/custom-fields/) as well. When you
define a custom field with the `localeString` type, Vendure stores translations for that field in the same
way it handles built-in translatable fields. This allows plugins and custom extensions to be fully
multi-language without additional effort.

## Further reading

* [Channels](/current/core/core-concepts/channels/) — how language settings relate to channel configuration
* [Translations developer guide](/current/core/developer-guide/translations/) — implementing translations in custom entities and plugins