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# CTFontCopyDefaultCascadeListForLanguages(_:_:)

Retrieves an ordered list of font substitution preferences.

```
func CTFontCopyDefaultCascadeListForLanguages(_ font: CTFont, _ languagePrefList: CFArray?) -> CFArray?
```

## Parameters

`font`

The font reference.

`languagePrefList`

The language preference list, an ordered array of <doc://com.apple.documentation/documentation/CoreFoundation/CFString>s of ISO language codes.

## Return Value

An ordered list of [`CTFontDescriptor`](/documentation/CoreText/CTFontDescriptor)s for font fallback according to the given language preferences.

## Discussion

When the original `font` used for text layout and rendering does not support a certain Unicode character from the provided text, the system follows this list to pick a fallback font that includes the character.

The font alternatives in the cascade list match the original font’s style, weight, and width.

---

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