diff --git a/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_KimoDataParser.swift b/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_KimoDataParser.swift
new file mode 100644
index 00000000..0e9ff265
--- /dev/null
+++ b/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_KimoDataParser.swift
@@ -0,0 +1,72 @@
+// (c) 2021 and onwards The vChewing Project (MIT-NTL License).
+// ====================
+// This code is released under the MIT license (SPDX-License-Identifier: MIT)
+// ... with NTL restriction stating that:
+// No trademark license is granted to use the trade names, trademarks, service
+// marks, or product names of Contributor, except as required to fulfill notice
+// requirements defined in MIT License.
+
+import Foundation
+import LineReader
+
+public extension LMMgr {
+  /// 匯入自奇摩輸入法使用者自訂詞資料庫匯出的 TXT 檔案。
+  /// - Parameter rawString: 原始 TXT 檔案內容。
+  /// - Returns: 成功匯入的資料數量。
+  @discardableResult static func importYahooKeyKeyUserDictionary(text rawString: inout String) -> Int {
+    var allPhrasesCHT = [UserPhrase]()
+    rawString.enumerateLines { currentLine, _ in
+      let cells = currentLine.split(separator: "\t")
+      guard cells.count >= 3, cells.first != "#", cells.first != "MJSR" else { return }
+      let value = cells[0].description
+      let keyArray = cells[1].split(separator: ",").map(\.description)
+      let phraseCHT = UserPhrase(keyArray: keyArray, value: value, inputMode: .imeModeCHT, isConverted: false)
+      guard phraseCHT.isValid, !phraseCHT.isDuplicated else { return }
+      guard !(phraseCHT.value.count == 1 && phraseCHT.keyArray.count == 1) else { return }
+      allPhrasesCHT.append(phraseCHT)
+    }
+    guard !allPhrasesCHT.isEmpty else { return 0 }
+    let allPhrasesCHS = allPhrasesCHT.compactMap { chtPhrase in
+      let chsPhrase = chtPhrase.crossConverted
+      return chsPhrase.isValid && !chsPhrase.isDuplicated ? chsPhrase : nil
+    }.deduplicated
+    let outputStrCHS = allPhrasesCHS.map(\.description).joined(separator: "\n")
+    let outputStrCHT = allPhrasesCHT.map(\.description).joined(separator: "\n")
+    var outputDataCHS = "\(outputStrCHS)\n".data(using: .utf8) ?? .init([])
+    var outputDataCHT = "\(outputStrCHT)\n".data(using: .utf8) ?? .init([])
+    let urlCHS = LMMgr.userDictDataURL(mode: .imeModeCHS, type: .thePhrases)
+    let urlCHT = LMMgr.userDictDataURL(mode: .imeModeCHT, type: .thePhrases)
+
+    let fileHandlerCHS = try? FileHandle(forUpdating: urlCHS)
+    let fileHandlerCHT = try? FileHandle(forUpdating: urlCHT)
+    guard let fileHandlerCHS = fileHandlerCHS, let fileHandlerCHT = fileHandlerCHT else { return 0 }
+    defer {
+      fileHandlerCHS.closeFile()
+      fileHandlerCHT.closeFile()
+    }
+
+    if let sizeCHS = fileSize(for: urlCHS), sizeCHS > 0 {
+      fileHandlerCHS.seek(toFileOffset: sizeCHS)
+      if fileHandlerCHS.readDataToEndOfFile().first != 0x0A {
+        outputDataCHS.insert(0x0A, at: 0)
+      }
+    }
+    fileHandlerCHS.seekToEndOfFile()
+    fileHandlerCHS.write(outputDataCHS)
+
+    if let sizeCHT = fileSize(for: urlCHT), sizeCHT > 0 {
+      fileHandlerCHT.seek(toFileOffset: sizeCHT)
+      if fileHandlerCHT.readDataToEndOfFile().first != 0x0A {
+        outputDataCHT.insert(0x0A, at: 0)
+      }
+    }
+    fileHandlerCHT.seekToEndOfFile()
+    fileHandlerCHT.write(outputDataCHT)
+
+    return allPhrasesCHT.count
+  }
+}
+
+private func fileSize(for theURL: URL) -> UInt64? {
+  (try? FileManager.default.attributesOfItem(atPath: theURL.path))?[FileAttributeKey.size] as? UInt64
+}
diff --git a/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_UserPhraseStructure.swift b/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_UserPhraseStructure.swift
index 14ec9b83..78e75fd0 100644
--- a/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_UserPhraseStructure.swift
+++ b/Packages/vChewing_MainAssembly/Sources/MainAssembly/LMMgr_UserPhraseStructure.swift
@@ -13,14 +13,14 @@ import Shared
 // MARK: - 使用者語彙類型定義
 
 public extension LMMgr {
-  struct UserPhrase {
+  struct UserPhrase: Hashable {
     public private(set) var keyArray: [String]
     public private(set) var value: String
     public private(set) var inputMode: Shared.InputMode
     public private(set) var isConverted: Bool = false
     public var weight: Double?
 
-    private var isDuplicated: Bool {
+    public var isDuplicated: Bool {
       LMMgr.checkIfPhrasePairExists(userPhrase: value, mode: inputMode, keyArray: keyArray)
     }