---
title: isoLanguageCodes
framework: foundation
role: symbol
role_heading: Type Property
path: foundation/locale/languagecode-swift.struct/isolanguagecodes
---

# isoLanguageCodes

Returns an array of ISO-defined language codes.

## Declaration

```swift
static var isoLanguageCodes: [Locale.LanguageCode] { get }
```

## Discussion

Discussion The returned array contains two-letter codes defined by ISO 639, as well as three-letter codes without a two-letter equivalent.