---
title: primaryLanguage
framework: uikit
role: symbol
role_heading: Instance Property
path: uikit/uiinputviewcontroller/primarylanguage
---

# primaryLanguage

The primary language for a custom keyboard.

## Declaration

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

## Discussion

Discussion A BCP 47 language identifier, such as en-US. If specified, this value supersedes the PrimaryLanguage key in a custom keyboard’s Info.plist file.