# Automate Presentation Localization in .NET

> Automate PowerPoint and OpenDocument slide localization in .NET with Aspose.Slides, using practical C# code samples and tips for faster global rollout.

Source: https://docs.aspose.com/slides/net/presentation-localization/
Updated: 2026-08-05


## **Overview**

This article explains how to set the `LanguageId` for text in a presentation by using Aspose.Slides. It shows how to open a presentation, add a shape with text, assign a language identifier to a text portion, and save the result as a PPTX file.

## **Change Language for a Presentation and Shape Text**
- Create an instance of [Presentation](https://reference.aspose.com/slides/net/aspose.slides/presentation) class.
- Obtain the reference of a slide by using its Index.
- Add an AutoShape of Rectangle type to the slide.
- Add some text to the TextFrame.
- Setting Language Id to text.
- Write the presentation as a PPTX file.

The implementation of the above steps is demonstrated below in an example.

```c#
using Aspose.Slides;

using (Presentation pres = new Presentation("test0.pptx"))
{
    IAutoShape shape = pres.Slides[0].Shapes.AddAutoShape(ShapeType.Rectangle, 50, 50, 200, 50);
    shape.AddTextFrame("Text to apply spellcheck language");
    shape.TextFrame.Paragraphs[0].Portions[0].PortionFormat.LanguageId = "en-US";

    pres.Save("test1.pptx",Aspose.Slides.Export.SaveFormat.Pptx);
}
```

## **FAQ**

### Does language ID trigger automatic text translation?

No. [LanguageId](https://reference.aspose.com/slides/net/aspose.slides/baseportionformat/languageid/) in Aspose.Slides stores the language for spell-checking and grammar proofing, but it does not translate or change the text content. It is metadata that PowerPoint understands for proofing.

### Does language ID affect hyphenation and line breaks during rendering?

In Aspose.Slides, [LanguageId](https://reference.aspose.com/slides/net/aspose.slides/baseportionformat/languageid/) is for proofing. Hyphenation quality and line wrapping primarily depend on the availability of [proper fonts](/slides/net/powerpoint-fonts/) and layout/line-break settings for the writing system. To ensure correct rendering, make the required fonts available, configure [font substitution rules](/slides/net/font-substitution/), and/or [embed fonts](/slides/net/embedded-font/) into the presentation.

### Can I set different languages within a single paragraph?

Yes. [LanguageId](https://reference.aspose.com/slides/net/aspose.slides/baseportionformat/languageid/) is applied at the text portion level, so a single paragraph can mix multiple languages with distinct proofing settings.