diff --git a/Packages/vChewing_LangModelAssembly/Sources/LangModelAssembly/SubLMs/lmCassette.swift b/Packages/vChewing_LangModelAssembly/Sources/LangModelAssembly/SubLMs/lmCassette.swift
index c32b2147..0ba20b56 100644
--- a/Packages/vChewing_LangModelAssembly/Sources/LangModelAssembly/SubLMs/lmCassette.swift
+++ b/Packages/vChewing_LangModelAssembly/Sources/LangModelAssembly/SubLMs/lmCassette.swift
@@ -37,6 +37,8 @@ extension vChewingLM {
     private static let fscale = 2.7
     private var norm = 0.0
 
+    /// 萬用花牌字符，哪怕花牌鍵仍不可用。
+    public var wildcard: String { wildcardKey.isEmpty ? "†" : wildcardKey }
     /// 資料陣列內承載的資料筆數。
     public var count: Int { charDefMap.count }
     /// 是否已有資料載入。
@@ -103,11 +105,9 @@ extension vChewingLM {
               charDefMap[strFirstCell, default: []].append(strSecondCell)
               reverseLookupMap[strSecondCell, default: []].append(strFirstCell)
               var keyComps = strFirstCell.charComponents
-              while !keyComps.isEmpty, !wildcardKey.isEmpty {
+              while !keyComps.isEmpty {
                 keyComps.removeLast()
-                if !wildcardKey.isEmpty {
-                  charDefWildcardMap[keyComps.joined() + wildcardKey, default: []].append(strSecondCell)
-                }
+                charDefWildcardMap[keyComps.joined() + wildcard, default: []].append(strSecondCell)
               }
             } else if loadingOctagramData, !strLine.contains("%octagram") {
               guard let countValue = Int(cells[1]) else { continue }
@@ -180,7 +180,7 @@ extension vChewingLM {
       let arrRaw = charDefMap[key]?.deduplicated ?? []
       var arrRawWildcard: [String] = []
       if let arrRawWildcardValues = charDefWildcardMap[key]?.deduplicated,
-        key.contains(wildcardKey), key.first?.description != wildcardKey
+        key.contains(wildcard), key.first?.description != wildcard
       {
         arrRawWildcard.append(contentsOf: arrRawWildcardValues)
       }
@@ -221,7 +221,7 @@ extension vChewingLM {
     ///   - key: 讀音索引鍵。
     public func hasUnigramsFor(key: String) -> Bool {
       charDefMap[key] != nil
-        || (charDefWildcardMap[key] != nil && key.contains(wildcardKey) && key.first?.description != wildcardKey)
+        || (charDefWildcardMap[key] != nil && key.contains(wildcard) && key.first?.description != wildcard)
     }
 
     // MARK: - Private Functions.
diff --git a/Source/Modules/InputHandler_HandleComposition.swift b/Source/Modules/InputHandler_HandleComposition.swift
index 12d6be7b..e1ef8e67 100644
--- a/Source/Modules/InputHandler_HandleComposition.swift
+++ b/Source/Modules/InputHandler_HandleComposition.swift
@@ -174,6 +174,7 @@ extension InputHandler {
   private func handleCassetteComposition(input: InputSignalProtocol) -> Bool? {
     guard let delegate = delegate else { return nil }
     var wildcardKey: String { currentLM.currentCassette.wildcardKey }  // 花牌鍵。
+    var wildcard: String { currentLM.currentCassette.wildcard }  // 花牌鍵。
     let isWildcardKeyInput: Bool = (input.text == wildcardKey && !wildcardKey.isEmpty)
 
     var keyConsumedByStrokes = false
@@ -182,8 +183,8 @@ extension InputHandler {
       || input.isControlHold || input.isOptionHold || input.isShiftHold || input.isCommandHold
 
     var isLongestPossibleKeyFormed: Bool {
-      guard !isWildcardKeyInput, !wildcardKey.isEmpty else { return false }
-      return !currentLM.currentCassette.hasUnigramsFor(key: calligrapher + wildcardKey) && !calligrapher.isEmpty
+      guard !isWildcardKeyInput else { return false }
+      return !currentLM.currentCassette.hasUnigramsFor(key: calligrapher + wildcard) && !calligrapher.isEmpty
     }
 
     var isStrokesFull: Bool {
@@ -199,7 +200,7 @@ extension InputHandler {
         delegate.switchState(newEmptyState)
         return true
       }
-      if isStrokesFull {
+      while isStrokesFull {
         calligrapher = String(calligrapher.dropLast(1))
       }
       calligrapher.append(input.text)