<!--
{
  "availability" : [
    "iOS: 15.0.0 - 17.0.0",
    "iPadOS: 15.0.0 - 17.0.0",
    "macCatalyst: 15.0.0 - 17.0.0",
    "macOS: 12.0.0 - 14.0.0",
    "tvOS: 15.0.0 - 17.0.0",
    "visionOS: 1.0.0 -",
    "watchOS: 8.0.0 - 10.0.0"
  ],
  "documentType" : "symbol",
  "framework" : "Foundation",
  "identifier" : "/documentation/Foundation/Morphology/CustomPronoun",
  "metadataVersion" : "0.1.0",
  "role" : "Structure",
  "symbol" : {
    "kind" : "Structure",
    "modules" : [
      "Foundation"
    ],
    "preciseIdentifier" : "s:10Foundation10MorphologyV13CustomPronounV"
  },
  "title" : "Morphology.CustomPronoun"
}
-->

# Morphology.CustomPronoun

A custom pronoun behavior for use in a specific langauge.

```
struct CustomPronoun
```

## Overview

Set a [`Morphology.CustomPronoun`](/documentation/Foundation/Morphology/CustomPronoun) instance on a [`Morphology`](/documentation/Foundation/Morphology) instance when you want to provide a langauge-specific customization of pronoun use in that language. Different languages have different requirements for the grammatical information needed to apply a custom pronoun, so you set custom pronoun behavior on a per-language basis.

The example below shows how to create English “ze” and “hir” custom pronouns:

```swift
let ze = Morphology.CustomPronoun()
ze.subjectForm = "ze"
ze.objectForm = "hir"
ze.possessiveForm = "hir"
ze.possessiveAdjectiveForm = "hir"
ze.reflexiveForm = "hirself"
```

[`Morphology.CustomPronoun`](/documentation/Foundation/Morphology/CustomPronoun) only supports third-person pronouns. Use this feature when your app needs to refer to third parties with a specific pronoun.

## Topics

### Creating a Custom Pronoun

[`init()`](/documentation/Foundation/Morphology/CustomPronoun/init())

Creates an empty custom pronoun.

### Assessing Custom Pronoun Support

[`isSupported(forLanguage:)`](/documentation/Foundation/Morphology/CustomPronoun/isSupported(forLanguage:))

Returns a Boolean value that indicates whether the given language supports setting custom pronouns.

[`requiredKeys(forLanguage:)`](/documentation/Foundation/Morphology/CustomPronoun/requiredKeys(forLanguage:))

Returns a collection of the custom pronoun keys required by this language.

### Determining Pronoun Forms

[`subjectForm`](/documentation/Foundation/Morphology/CustomPronoun/subjectForm)

The subject pronoun form to apply when using this custom pronoun behavior.

[`objectForm`](/documentation/Foundation/Morphology/CustomPronoun/objectForm)

The object pronoun form to apply when using this custom pronoun behavior.

[`possessiveForm`](/documentation/Foundation/Morphology/CustomPronoun/possessiveForm)

The posessive pronoun form to apply when using this custom pronoun behavior.

[`possessiveAdjectiveForm`](/documentation/Foundation/Morphology/CustomPronoun/possessiveAdjectiveForm)

The posessive adjective pronoun form to apply when using this custom pronoun behavior.

[`reflexiveForm`](/documentation/Foundation/Morphology/CustomPronoun/reflexiveForm)

The reflexive pronoun form to apply when using this custom pronoun behavior.

## Relationships

### Conforms To

[`Hashable`](/documentation/Swift/Hashable)

[`Equatable`](/documentation/Swift/Equatable)

[`Decodable`](/documentation/Swift/Decodable)

[`Encodable`](/documentation/Swift/Encodable)

[`Escapable`](/documentation/Swift/Escapable)

[`Sendable`](/documentation/Swift/Sendable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

[`Copyable`](/documentation/Swift/Copyable)

---

Copyright &copy; 2026 Apple Inc. All rights reserved. | [Terms of Use](https://www.apple.com/legal/internet-services/terms/site.html) | [Privacy Policy](https://www.apple.com/privacy/privacy-policy)