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# localizedSubtitle

The optional, user-visible subtitle for the Home Screen dynamic mutable quick action.

```
var localizedSubtitle: String? { get set }
```

## Discussion

If you specify a subtitle for a mutable quick action, the system then displays the title on a single line (potentially with an ellipsis character), no matter how long the title is.

To internationalize the subtitle for a Home Screen mutable, dynamic quick action, employ the <doc://com.apple.documentation/documentation/Foundation/NSLocalizedString> Foundation function, described in <doc://com.apple.documentation/documentation/Foundation/foundation-functions>, along with a `Localized.strings` file in your Xcode project.

---

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