---
title: SFCustomLanguageModelData.CustomPronunciation
framework: speech
role: symbol
role_heading: Structure
path: speech/sfcustomlanguagemodeldata/custompronunciation
---

# SFCustomLanguageModelData.CustomPronunciation

A term to be introduced into the speech recognition model’s vocabulary.

## Declaration

```swift
struct CustomPronunciation
```

## Overview

Overview Attempts to add terms that are already in the model’s vocabulary will be ignored. Pronunciations that use X-SAMPA symbols that are not supported will be ignored; see supportedPhonemes(locale:) for the set of supported symbols.

## Topics

### Creating a term

- [init(grapheme:phonemes:)](speech/sfcustomlanguagemodeldata/custompronunciation/init(grapheme:phonemes:).md)

### Inspecting a term

- [grapheme](speech/sfcustomlanguagemodeldata/custompronunciation/grapheme.md)
- [phonemes](speech/sfcustomlanguagemodeldata/custompronunciation/phonemes.md)

## Relationships

### Conforms To

- [CustomStringConvertible](swift/customstringconvertible.md)
- [DataInsertable](speech/datainsertable.md)
- [Decodable](swift/decodable.md)
- [Encodable](swift/encodable.md)
- [Equatable](swift/equatable.md)
- [Hashable](swift/hashable.md)
- [Sendable](swift/sendable.md)
- [SendableMetatype](swift/sendablemetatype.md)

## See Also

### Adding terms

- [insert(term:)](speech/sfcustomlanguagemodeldata/insert(term:).md)
- [supportedPhonemes(locale:)](speech/sfcustomlanguagemodeldata/supportedphonemes(locale:).md)