> For the complete documentation index, see [llms.txt](https://help.sipgate.de/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://help.sipgate.de/ai-agents/en/behavior/stimme-and-sprache.md).

# Voice & language

In this area, you define how your AI phone assistant sounds and how it speaks with callers. The settings for voice, language, and greeting apply to all conversations of this AI Agent and can be adjusted at any time.

### Select AI Agent language

Choose the language in which your agent should hold conversations. Available options are: German, English, Spanish, French, Polish, Dutch, Arabic, Turkish, Russian.

The language determines how your agent understands and responds to callers. The agent always replies in the set language, regardless of which language the caller speaks.

{% hint style="info" %}
**Note:** If your company regularly receives calls in different languages, it is recommended to set up a separate agent for each language.
{% endhint %}

<figure><img src="/files/7095670bc86d33100d64f9f7917e5d90df24a66d" alt=""><figcaption></figcaption></figure>

### Choose voice

Choose a voice that fits your company and target audience. The voice influences how professional and understandable the agent is perceived to be.

#### Recommended voices

There are many voices to choose from. To save you from testing them all yourself, our Conversation Experience Team has evaluated the voices for clarity, pronunciation, and naturalness, even with more complex content such as numbers, URLs, anglicisms, or spontaneous colloquial speech. These four voices stood out in particular:

| Voice    | Language | Character             |
| -------- | -------- | --------------------- |
| Philipp  | German   | Neutral & reliable    |
| Ramona   | German   | Calm & professional   |
| Benjamin | German   | Efficient & clear     |
| Laura    | German   | Direct & professional |

{% hint style="info" %}
**Note on proper names:** Company, street, and technical terms are pronounced differently depending on the voice. Test your agent with a test call before using it. If a voice does not render your company name correctly, switch the voice.
{% endhint %}

#### Monolingual or multilingual?

Choose the voice that sounds most natural for your use cases. Test the desired voice with typical conversation scenarios before deployment, especially if numbers, proper names, or technical terms are frequently used. Differences are best seen in practical use.

{% hint style="success" icon="envelopes" %}
**Questions or feedback about voices?**

The Conversation Experience Team can help: [**stimmen-feedback@sipgate.de**](mailto:stimmen-feedback@sipgate.de)
{% endhint %}

### Set form of address <a href="#ansprache" id="ansprache"></a>

Define whether your agent addresses callers with **you (formal)** or **you (informal)** .

* **you (formal)** (Formal): suitable for customer service, B2B, and conservative industries
* **you (informal)** (Informal): suitable for modern companies and younger target groups

The chosen form of address determines exclusively the use of **"Sie"** or **"Du"**. It does not affect the agent's general language style. Polite and respectful behavior is stored by default, regardless of the selected form of address.

The form of address applies to all conversations of this agent and should match your company communication.

### Customize greeting text

You can individually define the greeting text of your AI Agent and adapt it to your company communication.

<figure><img src="/files/dbecc6ac6ab6f3b2f33d5ff845dfe0f609718c3f" alt=""><figcaption></figcaption></figure>

{% hint style="warning" %}
**Important:** The greeting text must include a note that this is a digital service. The text is reproduced verbatim, regardless of the set language.
{% endhint %}

### **Barge-in**

With Barge-in, you define whether callers can interrupt the AI Agent while it is speaking. If the function is active, the agent stops immediately as soon as the caller speaks and listens. This makes conversations more natural and reduces waiting time.

**Where can I find the setting?**

In the logged-in area under Account management → AI Agents → Select agent → Agent settings. Depending on the account configuration, the feature may first need to be activated. If you have any questions, please contact sipgate customer support.

**What options are available?**

Under the interruption section, choose between two settings:

* **Agent speaks to the end without interruption:** The agent cannot be interrupted while responding and finishes speaking its full turn.
* **Caller can interrupt agent:**
  * As soon as the caller speaks, the agent stops and listens.
  * The greeting message is excluded from this and cannot be interrupted for privacy reasons.
  * If the agent is interrupted, the already generated response remains visible in the transcript, even if it was not spoken in full.

{% hint style="info" %}
**Note:** Barge-in is not enabled by default. To allow callers to interrupt the agent, you must select and save the corresponding option in the agent settings.
{% endhint %}

### Enable background noise (optional)

Optional background noises can be enabled, such as office sounds. This setting shapes the atmosphere of the conversation and can create the impression of a real workplace.

### Language of the conversation summary

Specify in which language conversation summaries should be created.

**Example:** Your agent conducts conversations in English, but your team works in German. Set the summary language to German so all employees can use the transcripts directly.<br>


---

# Agent Instructions
This documentation is published with GitBook. GitBook is the documentation platform designed so that both humans and AI agents can read, navigate, and reason over technical content effectively. Learn more at gitbook.com.

## 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, and the optional `goal` query parameter:

```
GET https://help.sipgate.de/ai-agents/en/behavior/stimme-and-sprache.md?ask=<question>&goal=<endgoal>
```

`ask` is the immediate question: it should be specific, self-contained, and written in natural language.
`goal` is optional and describes the broader end goal you are ultimately trying to accomplish on behalf of the user. GitBook uses it to tailor the answer towards what is most useful for that goal.

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.