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

# extendedLanguageTag

The language tag of the track.

## Declaration

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

## Discussion

Discussion The value is a BCP-47 language tag, or nil if the track doesn’t specify a language tag.