diff --git a/Packages/vChewing_CocoaExtension/Sources/CocoaExtension/CocoaExtension_Misc.swift b/Packages/vChewing_CocoaExtension/Sources/CocoaExtension/CocoaExtension_Misc.swift
index 3278d304..b90ae244 100644
--- a/Packages/vChewing_CocoaExtension/Sources/CocoaExtension/CocoaExtension_Misc.swift
+++ b/Packages/vChewing_CocoaExtension/Sources/CocoaExtension/CocoaExtension_Misc.swift
@@ -8,7 +8,13 @@
 
 import Cocoa
 
-// MARK: NSRect Extension
+// MARK: - NSMutableString extension
+
+extension NSMutableString {
+  public var localized: String { NSLocalizedString(description, comment: "") }
+}
+
+// MARK: - NSRect Extension
 
 extension NSRect {
   public static var seniorTheBeast: NSRect {
diff --git a/Packages/vChewing_SwiftExtension/Sources/SwiftExtension/SwiftExtension.swift b/Packages/vChewing_SwiftExtension/Sources/SwiftExtension/SwiftExtension.swift
index d6fd076d..aaa40aff 100644
--- a/Packages/vChewing_SwiftExtension/Sources/SwiftExtension/SwiftExtension.swift
+++ b/Packages/vChewing_SwiftExtension/Sources/SwiftExtension/SwiftExtension.swift
@@ -8,6 +8,12 @@
 
 import Foundation
 
+// MARK: - String.localized extension
+
+extension StringLiteralType {
+  public var localized: String { NSLocalizedString(description, comment: "") }
+}
+
 // MARK: - Root Extensions
 
 // Extend the RangeReplaceableCollection to allow it clean duplicated characters.