diff --git a/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorDelegate.swift b/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorDelegate.swift
index 2e75c5ab..e614eff1 100644
--- a/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorDelegate.swift
+++ b/Packages/vChewing_PhraseEditorUI/Sources/PhraseEditorUI/PhraseEditorDelegate.swift
@@ -18,4 +18,5 @@ public protocol PhraseEditorDelegate {
   func checkIfUserPhraseExist(userPhrase: String, mode: Shared.InputMode, key unigramKey: String) -> Bool
   func consolidate(text strProcessed: inout String, pragma shouldCheckPragma: Bool)
   func openPhraseFile(mode: Shared.InputMode, type: vChewingLM.ReplacableUserDataType, app: String)
+  func tagOverrides(in strProcessed: inout String, mode: Shared.InputMode)
 }
diff --git a/Source/Modules/LMMgr.swift b/Source/Modules/LMMgr.swift
index 446ab9d7..496f1ca7 100644
--- a/Source/Modules/LMMgr.swift
+++ b/Source/Modules/LMMgr.swift
@@ -276,11 +276,18 @@ public class LMMgr {
   public static func checkIfUserPhraseExist(
     userPhrase: String,
     mode: Shared.InputMode,
-    key unigramKey: String
+    key unigramKey: String,
+    factoryDictionaryOnly: Bool = false
   ) -> Bool {
     switch mode {
-      case .imeModeCHS: return lmCHS.hasKeyValuePairFor(keyArray: [unigramKey], value: userPhrase)
-      case .imeModeCHT: return lmCHT.hasKeyValuePairFor(keyArray: [unigramKey], value: userPhrase)
+      case .imeModeCHS:
+        return lmCHS.hasKeyValuePairFor(
+          keyArray: [unigramKey], value: userPhrase, factoryDictionaryOnly: factoryDictionaryOnly
+        )
+      case .imeModeCHT:
+        return lmCHT.hasKeyValuePairFor(
+          keyArray: [unigramKey], value: userPhrase, factoryDictionaryOnly: factoryDictionaryOnly
+        )
       case .imeModeNULL: return false
     }
   }
@@ -782,4 +789,20 @@ extension LMMgr: PhraseEditorDelegate {
     }
     return data
   }
+
+  public func tagOverrides(in strProcessed: inout String, mode: Shared.InputMode) {
+    let outputStack: NSMutableString = .init()
+    for currentLine in strProcessed.split(separator: "\n") {
+      let arr = currentLine.split(separator: " ")
+      guard arr.count >= 2 else { continue }
+      let exists = Self.checkIfUserPhraseExist(
+        userPhrase: arr[0].description, mode: mode, key: arr[1].description, factoryDictionaryOnly: true
+      )
+      outputStack.append(currentLine.description)
+      let replace = !currentLine.contains(" #𝙾𝚟𝚎𝚛𝚛𝚒𝚍𝚎") && exists
+      if replace { outputStack.append(" #𝙾𝚟𝚎𝚛𝚛𝚒𝚍𝚎") }
+      outputStack.append("\n")
+    }
+    strProcessed = outputStack.description
+  }
 }