# Set client language

The Set client language action node changes the language used by an app, instantly altering the text and formatting of dates and numbers. To set a language, it must be first added under [Internationalization](/reference/resources/internationalization.md).

## Usage

This action node is typically used to allow a user to set a language preference for your app(s). It is possible to store a language as an object class property, for example as part of an object attached to a user, and enable that language using Set client language.

For a step-by-step guide to adding a language switcher to an app, see[ Change the active language](/how-to/enhance-your-app/change-the-active-language.md).

## Properties

<table><thead><tr><th width="269">Property</th><th>Description</th></tr></thead><tbody><tr><td><strong>Language</strong></td><td>Select a language from the list of languages added to the solution.</td></tr><tr><td><strong>Language from data</strong></td><td>Select a language dynamically using a <a href="/pages/-MiR7spoCXs5BAzGkvRX">data binding</a>.</td></tr></tbody></table>


---

# Agent Instructions: Querying This Documentation

If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question.

Perform an HTTP GET request on the current page URL with the `ask` query parameter:

```
GET https://docs.appfarm.io/library/action-nodes/set-client-language.md?ask=<question>
```

The question should be specific, self-contained, and written in natural language.
The response will contain a direct answer to the question and relevant excerpts and sources from the documentation.

Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.