Function CTFontCreateUIFontForLanguage 

pub unsafe extern "C-unwind" fn CTFontCreateUIFontForLanguage(
    ui_type: CTFontUIFontType,
    size: CGFloat,
    language: Option<&CFString>,
) -> Option<CFRetained<CTFont>>

👎Deprecated: renamed to CTFont::new_ui_font_for_language

Available on crate feature CTFont only.