kCTFontDescriptorLanguageAttribute
Declaration
let kCTFontDescriptorLanguageAttribute: CFStringDiscussion
The language identifier for font fallback selection.
The value associated with this key is a CFStringRef. If specified in a font descriptor, it is used to select the appropriate font fallback list for the language. This key should not be confused with kCTLanguageAttributeName, which is defined in CTStringAttributes.h.