> For the complete documentation index, see [llms.txt](https://docs.apryse.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.apryse.com/web/get-started/samples/internationalization.md).

# Switch Toolbar Language - Internationalization

JavaScript sample to change the language displayed in the toolbar of a PDF Viewer. In this example toggle between English, French & Chinese Simplified

{% hint style="info" %}
**Requirements**

*These packages are required to use these features in production. Trial keys have unlimited access to all features*

<a href="/web/get-started/readme.md" class="button primary">Web SDK</a><a href="https://showcase.apryse.com/language-switcher" class="button primary">Live demo</a>
{% endhint %}

This JavaScript sample lets you change the language displayed in tooltips when viewing documents in PDF Viewer. Compatible with all browsers (including IE11) and mobile devices without using plug-ins.

Launch the [Internationalization Demo](https://showcase.apryse.com/language-switcher) to see an example of how you can toggle between English, French and Chinese Simplified in WebViewer.

Learn more about our [Web SDK](/web/get-started/guides.md).

{% tabs %}
{% tab title="JavaScript" %}
{% code lineNumbers="true" %}

```js
// eslint-disable-next-line no-undef
const WebViewerConstructor = isWebComponent() ? WebViewer.WebComponent : WebViewer;

WebViewerConstructor(
  {
    path: '../../../lib',
    additionalTranslations: {
      language: 'en',
      translations: { 'option.toolbarGroup.toolbarGroup-View': 'Edited View Label' },
    },
    initialDoc: 'https://pdftron.s3.amazonaws.com/downloads/pl/demo-annotated.pdf',
  },
  document.getElementById('viewer')
).then(instance => {
  samplesSetup(instance);

  const currentLanguage = instance.UI.getCurrentLanguage();
  const radioButton = document.querySelector(`form > #${currentLanguage}`);
  if (radioButton) {
    radioButton.checked = true;
  }

  document.getElementById('form').onchange = e => {
    // Set language
    instance.UI.setLanguage(e.target.id);
  };
});
```

{% endcode %}
{% endtab %}
{% endtabs %}


---

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