---
title: extendedLanguageTag
framework: avfoundation
role: symbol
role_heading: Instance Property
path: avfoundation/avmutablecompositiontrack/extendedlanguagetag
---

# extendedLanguageTag

The language tag associated with the track, as an RFC 4646 language tag.

## Declaration

```swift
var extendedLanguageTag: String? { get set }
```

## Discussion

Discussion If not set, the value is nil.

## See Also

### Configuring track properties

- [isEnabled](avfoundation/avmutablecompositiontrack/isenabled.md)
- [naturalTimeScale](avfoundation/avmutablecompositiontrack/naturaltimescale.md)
- [languageCode](avfoundation/avmutablecompositiontrack/languagecode.md)
- [preferredTransform](avfoundation/avmutablecompositiontrack/preferredtransform.md)
- [preferredVolume](avfoundation/avmutablecompositiontrack/preferredvolume.md)