Added extension for languages.

Author: ivanvorobei

Sources/SwiftBoost/Foundation/Extensions/LocaleExtension.swift

@@ -11,6 +11,26 @@ public extension Locale {
         return dateString.contains(dateFormatter.amSymbol) || dateString.contains(dateFormatter.pmSymbol)
     }
 
+    func localised(in locale: Locale) -> String? {
+        guard let currentLanguageCode = {
+            if #available(iOS 16, *) {
+                return self.language.languageCode?.identifier
+            } else {
+                return self.languageCode
+            }
+        }() else { return nil }
+        guard let toLanguageCode = {
+            if #available(iOS 16, *) {
+                return locale.language.languageCode?.identifier
+            } else {
+                return locale.languageCode
+            }
+        }() else { return nil }
+        let nslocale = NSLocale(localeIdentifier: toLanguageCode)
+        let text = nslocale.displayName(forKey: NSLocale.Key.identifier, value: currentLanguageCode)
+        return text?.localizedCapitalized
+    }
+    
     static func flagEmoji(forRegionCode isoRegionCode: String) -> String? {
         guard isoRegionCodes.contains(isoRegionCode) else { return nil }
         return isoRegionCode.unicodeScalars.reduce(into: String()) {