# `GSFontMaster localizedCustomValueForKey:script:`

*Instance Method*

## Declaration

```swift
func localizedCustomValue(forKey key: String, script: String) -> CGFloat
```

```objc
- (CGFloat) localizedCustomValueForKey:(NSString *) key script:(NSString *) script;
```

```python
localizedCustomValueForKey_script_(key: str, script: str) -> float
```