# `GSGlyph.isCJK`

*Instance Property*

Whether the glyph uses CJK layout behavior.

## Declaration

```swift
var isCJK: Bool { get }
```

```objc
@property (nonatomic, readonly) BOOL isCJK;
```

```python
isCJK() -> bool
```

## Discussion

This includes glyphs with a CJK script and glyphs using the full-width naming convention.

## See Also

### Derived Glyph Info

- [`GSGlyph.isVerticalRotationClockwise`](/Core/GlyphsCore/GSGlyph/isVerticalRotationClockwise) — Whether the glyph is rotated clockwise in vertical text.
- [`GSGlyph.isTabular`](/Core/GlyphsCore/GSGlyph/isTabular) — Whether the glyph uses a tabular-figure naming convention.