# User interface language

{% hint style="info" %}
This command is available for devices with firmware version ≥ 1.8.
{% endhint %}

{% tabs %}
{% tab title="SET" %}
This command is used to set the user interface language.

<table data-header-hidden><thead><tr><th width="142">Byte index</th><th>Hex value – Meaning</th></tr></thead><tbody><tr><td><strong>Byte index</strong></td><td><strong>Hex value – Meaning</strong></td></tr><tr><td>0</td><td>9A – The command code.</td></tr><tr><td>1</td><td><p>00 - English; <strong>Default</strong>.</p><p>01 - French; </p><p>02 - German; Available for devices with firmware ≥ 2.1.</p><p>03 - Spanish; Available for devices with firmware ≥ 2.1.</p></td></tr></tbody></table>

**Example command:** 0x9A01 – The server sets the user interface language French.
{% endtab %}

{% tab title="GET" %}
This command is used to get the user interface language.

<table data-header-hidden><thead><tr><th width="99.99999999999997">Byte index</th><th width="168">Sent request</th><th>Received response</th></tr></thead><tbody><tr><td><strong>Byte index</strong></td><td><strong>Sent request</strong></td><td><strong>Received response</strong></td></tr><tr><td>0</td><td>9B – Command code.</td><td>9B – The command code.</td></tr><tr><td>1</td><td></td><td><p>00 - English; </p><p>01 - French; </p><p>02 - German; </p><p>03 - Spanish;</p></td></tr></tbody></table>

**Example command:** 0x9B;

**Example response:** 0x9B01 - The user interface language is French.
{% endtab %}
{% endtabs %}


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# 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.mclimate.eu/mclimate-lorawan-devices/devices/mclimate-fan-coil-thermostat-fct/mclimate-fan-coil-thermostat-device-communication-protocol/general-display-and-power-recovery/user-interface-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.