---
title: isISOLanguage
framework: foundation
role: symbol
role_heading: Instance Property
path: foundation/locale/languagecode-swift.struct/isisolanguage
---

# isISOLanguage

A Boolean value that indicates whether this language code is in the list of ISO-defined languages.

## Declaration

```swift
var isISOLanguage: Bool { get }
```

## Discussion

Discussion The following code snippet illustrates use of the isISOLanguage value. let enIsISO = Locale.LanguageCode("en").isISOLanguage // true let gibberishIsISO = Locale.LanguageCode("gibberish").isISOLanguage // false

## See Also

### Examining language code properties

- [identifier](foundation/locale/languagecode-swift.struct/identifier.md)