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Shahed NasserandGitHub c1a5390fc6 docs: translation module (#14271)
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import { Prerequisites } from "docs-ui"
export const metadata = {
title: `Translation Concepts`,
}
# {metadata.title}
In this guide, you'll learn about the key concepts related to the Translation Module, including locales and translations.
<Prerequisites
items={[
{
text: "Translation Module Configured",
link: "/commerce-modules/translation#configure-translation-module",
},
]}
/>
## Locales
The [Locale data model](/references/translation/models/Locale) represents a language that resources can be translated into.
Its `code` property follows the [IETF BCP 47 standard](https://gist.github.com/typpo/b2b828a35e683b9bf8db91b5404f1bd1). For example, `en-US` represents American English, while `fr-FR` represents French (France).
Locales are automatically populated in your Medusa application the first time the Translation Module is used.
### Default Locale
The Translation Module doesn't enforce a default locale. If a resource doesn't have a translation in the requested locale, it will fall back to the original value stored in the resource's data model.
---
## Translations
The [Translation data model](/references/translation/models/Translation) represents a translated value for a specific resource in a specific locale.
The data model has the following properties to associate the translation with the resource:
- `reference_id`: The ID of the resource being translated (for example, the ID of the product being translated).
- `reference`: The name of the table where the resource is stored (for example, `product` when translating a product).
The locale of the translation is indicated by the `locale_code` property, which follows the same [IETF BCP 47 standard](https://gist.github.com/typpo/b2b828a35e683b9bf8db91b5404f1bd1) as the [Locale](#locales) data model.
A resource may have only one translation per locale. For example, a product can have only one translation in `fr-FR` and another translation in `es-ES`.
The actual translated values are stored in the `translations` property, which is a JSON object where each key represents a field of the resource being translated, and the value is the translated text.
For example, a translation for a product to French (`fr-FR`) may look like this:
```json
{
"reference_id": "prod_123",
"reference": "product",
"locale_code": "fr-FR",
"translations": {
"title": "Produit Exemple",
"description": "Ceci est une description en français."
}
}
```
Each key in the `translations` object corresponds to a property in the product resource, such as `title` and `description`, with their respective translated values.
---
## Retrieve Translations in Medusa
<Note>
To retrieve translations for the storefront, refer to the [Serve Translations in the Storefront](../storefront/page.mdx) guide.
</Note>
You can retrieve translations for a resource on the Medusa server using [Query](!docs!/learn/fundamentals/module-links/query). You can filter translations by `reference_id` and `locale_code` to get the specific translation you need.
For example:
```ts
const { data: translations } = await query.graph({
entity: "translation",
fields: ["reference_id", "locale_code", "translations"],
filters: {
reference_id: "prod_123",
locale_code: "fr-FR",
},
})
console.log(translations)
// Output:
// [{
// reference_id: "prod_123",
// locale_code: "fr-FR",
// translations: {
// title: "Produit Exemple",
// description: "Ceci est une description en français."
// }
// }]
```
In this example, you retrieve the translation records of a product with the ID `prod_123` in French (`fr-FR`).
If you've enabled the [Caching Module](../../../infrastructure-modules/caching/page.mdx) in your Medusa application, you can also cache translation queries to improve performance:
```ts
const { data: translations } = await query.graph({
entity: "translation",
fields: ["reference_id", "locale_code", "translations"],
filters: {
reference_id: "prod_123",
locale_code: "fr-FR",
},
}, {
cache: {
enable: true,
},
})
console.log(translations)
// Output:
// [{
// reference_id: "prod_123",
// locale_code: "fr-FR",
// translations: {
// title: "Produit Exemple",
// description: "Ceci est une description en français."
// }
// }]
```