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# subtitleLocalizationKey

The key that identifies the localized string for the notification’s subtitle.

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

## Discussion

CloudKit uses this value to set the `subtitle-loc-key` push notification property. Setting this property overrides any value in [`subtitle`](/documentation/CloudKit/CKSubscription/NotificationInfo-swift.class/subtitle).

See <doc://com.apple.documentation/documentation/UserNotifications/generating-a-remote-notification> for more details about push notification properties.

---

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