diff --git a/Source/WindowNIBs/Base.lproj/frmPrefWindow.xib b/Source/WindowNIBs/Base.lproj/frmPrefWindow.xib
index 26b49160..9117243a 100644
--- a/Source/WindowNIBs/Base.lproj/frmPrefWindow.xib
+++ b/Source/WindowNIBs/Base.lproj/frmPrefWindow.xib
@@ -883,17 +883,17 @@
         </view>
         <customObject id="-3" userLabel="Application" customClass="NSObject"/>
         <view id="XWo-36-xGi" userLabel="vwrBehavior">
-            <rect key="frame" x="0.0" y="0.0" width="577" height="553"/>
+            <rect key="frame" x="0.0" y="0.0" width="577" height="573"/>
             <autoresizingMask key="autoresizingMask" flexibleMaxX="YES" flexibleMinY="YES"/>
             <subviews>
                 <stackView distribution="fill" orientation="vertical" alignment="leading" spacing="12" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" translatesAutoresizingMaskIntoConstraints="NO" id="j9R-fB-ttM">
-                    <rect key="frame" x="20" y="38" width="530" height="495"/>
+                    <rect key="frame" x="20" y="37" width="530" height="516"/>
                     <subviews>
                         <stackView distribution="fill" orientation="vertical" alignment="leading" spacing="5" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" translatesAutoresizingMaskIntoConstraints="NO" id="pwZ-0Z-1ID">
-                            <rect key="frame" x="0.0" y="410" width="530" height="85"/>
+                            <rect key="frame" x="0.0" y="410" width="530" height="106"/>
                             <subviews>
                                 <button translatesAutoresizingMaskIntoConstraints="NO" id="109">
-                                    <rect key="frame" x="-1" y="68.5" width="285" height="17"/>
+                                    <rect key="frame" x="-1" y="89.5" width="285" height="17"/>
                                     <constraints>
                                         <constraint firstAttribute="height" constant="16" id="PYH-8e-mUx"/>
                                     </constraints>
@@ -906,7 +906,7 @@
                                     </connections>
                                 </button>
                                 <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="bE0-Lq-Pj7">
-                                    <rect key="frame" x="-1" y="47.5" width="266" height="17"/>
+                                    <rect key="frame" x="-1" y="68.5" width="266" height="17"/>
                                     <constraints>
                                         <constraint firstAttribute="height" constant="16" id="6uT-D5-KVx"/>
                                     </constraints>
@@ -919,7 +919,7 @@
                                     </connections>
                                 </button>
                                 <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="6MM-WC-Mpd">
-                                    <rect key="frame" x="-1" y="26.5" width="381" height="17"/>
+                                    <rect key="frame" x="-1" y="47.5" width="381" height="17"/>
                                     <constraints>
                                         <constraint firstAttribute="height" constant="16" id="hhN-al-6OI"/>
                                     </constraints>
@@ -931,6 +931,19 @@
                                         <binding destination="32" name="value" keyPath="values.AlsoConfirmAssociatedCandidatesByEnter" id="P1C-j9-N88"/>
                                     </connections>
                                 </button>
+                                <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="a6O-JL-C4g">
+                                    <rect key="frame" x="-1" y="26.5" width="247" height="17"/>
+                                    <constraints>
+                                        <constraint firstAttribute="height" constant="16" id="WkD-Wx-erN"/>
+                                    </constraints>
+                                    <buttonCell key="cell" type="check" title="Accept leading intonations in rare cases" bezelStyle="regularSquare" imagePosition="left" controlSize="small" inset="2" id="lblAcceptLeadingIntonations">
+                                        <behavior key="behavior" changeContents="YES" doesNotDimImage="YES" lightByContents="YES"/>
+                                        <font key="font" metaFont="cellTitle"/>
+                                    </buttonCell>
+                                    <connections>
+                                        <binding destination="32" name="value" keyPath="values.AcceptLeadingIntonations" id="l0S-gB-ckP"/>
+                                    </connections>
+                                </button>
                                 <button verticalHuggingPriority="750" translatesAutoresizingMaskIntoConstraints="NO" id="7QM-7z-tpq">
                                     <rect key="frame" x="-1" y="5.5" width="233" height="17"/>
                                     <constraints>
@@ -957,6 +970,7 @@
                                 <integer value="1000"/>
                                 <integer value="1000"/>
                                 <integer value="1000"/>
+                                <integer value="1000"/>
                             </visibilityPriorities>
                             <customSpacing>
                                 <real value="3.4028234663852886e+38"/>
@@ -964,6 +978,7 @@
                                 <real value="3.4028234663852886e+38"/>
                                 <real value="3.4028234663852886e+38"/>
                                 <real value="3.4028234663852886e+38"/>
+                                <real value="3.4028234663852886e+38"/>
                             </customSpacing>
                         </stackView>
                         <stackView distribution="fill" orientation="vertical" alignment="leading" horizontalStackHuggingPriority="249.99998474121094" verticalStackHuggingPriority="249.99998474121094" translatesAutoresizingMaskIntoConstraints="NO" id="fO5-4y-X0y">
@@ -1241,7 +1256,7 @@
                 <constraint firstItem="j9R-fB-ttM" firstAttribute="leading" secondItem="XWo-36-xGi" secondAttribute="leading" constant="20" symbolic="YES" id="4lO-GJ-Cpr"/>
                 <constraint firstItem="j9R-fB-ttM" firstAttribute="top" secondItem="XWo-36-xGi" secondAttribute="top" constant="20" symbolic="YES" id="CuZ-dn-mQZ"/>
             </constraints>
-            <point key="canvasLocation" x="-1351.5" y="597.5"/>
+            <point key="canvasLocation" x="-1351.5" y="607.5"/>
         </view>
         <userDefaultsController representsSharedInstance="YES" id="32"/>
         <view id="Rnp-LM-RIF" userLabel="vwrDictionary">
@@ -1592,7 +1607,7 @@
                             <rect key="frame" x="0.0" y="71" width="538" height="370"/>
                             <clipView key="contentView" drawsBackground="NO" id="x8s-wo-bxi">
                                 <rect key="frame" x="0.0" y="0.0" width="538" height="370"/>
-                                <autoresizingMask key="autoresizingMask" widthSizable="YES" heightSizable="YES"/>
+                                <autoresizingMask key="autoresizingMask"/>
                                 <subviews>
                                     <textView wantsLayer="YES" importsGraphics="NO" richText="NO" verticallyResizable="YES" allowsUndo="YES" smartInsertDelete="YES" id="kSG-dz-P2N">
                                         <rect key="frame" x="0.0" y="0.0" width="538" height="370"/>
diff --git a/Source/WindowNIBs/en.lproj/frmPrefWindow.strings b/Source/WindowNIBs/en.lproj/frmPrefWindow.strings
index 79499117..e13bf5b4 100644
--- a/Source/WindowNIBs/en.lproj/frmPrefWindow.strings
+++ b/Source/WindowNIBs/en.lproj/frmPrefWindow.strings
@@ -76,6 +76,7 @@
 "jQC-12-UuK.ibShadowedObjectValues[0]" = "Item 1";
 "jQC-12-UuK.ibShadowedObjectValues[1]" = "Item 2";
 "jQC-12-UuK.ibShadowedObjectValues[2]" = "Item 3";
+"lblAcceptLeadingIntonations.title" = "Accept leading intonations in rare cases";
 "lblAlwaysShowTooltipTextsHorizontally.title" = "Always show tooltip texts horizontally";
 "lblDevZoneIMKCandidate.title" = "IMK candidate window relies on certain Apple private APIs which are force-exposed by using bridging headers. Its usability, at this moment, is only guaranteed from macOS 10.14 Mojave to macOS 13 Ventura. Further tests are required in the future in order to tell whether it is usable in newer macOS releases.";
 "lblDevZoneTitleDescription.title" = "Warning: This page is for testing future features. \nFeatures listed here may not work as expected.";
diff --git a/Source/WindowNIBs/ja.lproj/frmPrefWindow.strings b/Source/WindowNIBs/ja.lproj/frmPrefWindow.strings
index cc2574e2..b94864bd 100644
--- a/Source/WindowNIBs/ja.lproj/frmPrefWindow.strings
+++ b/Source/WindowNIBs/ja.lproj/frmPrefWindow.strings
@@ -76,6 +76,7 @@
 "jQC-12-UuK.ibShadowedObjectValues[0]" = "Item 1";
 "jQC-12-UuK.ibShadowedObjectValues[1]" = "Item 2";
 "jQC-12-UuK.ibShadowedObjectValues[2]" = "Item 3";
+"lblAcceptLeadingIntonations.title" = "まれな場合には、音調記号の優先入力を許容する";
 "lblAlwaysShowTooltipTextsHorizontally.title" = "ヒントを常に横書きにする";
 "lblDevZoneIMKCandidate.title" = "IMK 候補陳列ウィンドウは、Apple の未公開のAPIを「bridging-header」という強引的な手段で引き出して利用した機能である。現時点で macOS 10.14 Mojave から macOS 13 Ventura まで利用可能であるが、その後の新しい macOS との互換性の話はまだ早い。";
 "lblDevZoneTitleDescription.title" = "警告：これからの新機能テストのために作ったページですから、\nここで陳列されている諸機能は予想通り動けるだと思わないでください。";
diff --git a/Source/WindowNIBs/zh-Hans.lproj/frmPrefWindow.strings b/Source/WindowNIBs/zh-Hans.lproj/frmPrefWindow.strings
index d7d94bde..fae358e0 100644
--- a/Source/WindowNIBs/zh-Hans.lproj/frmPrefWindow.strings
+++ b/Source/WindowNIBs/zh-Hans.lproj/frmPrefWindow.strings
@@ -76,6 +76,7 @@
 "jQC-12-UuK.ibShadowedObjectValues[0]" = "Item 1";
 "jQC-12-UuK.ibShadowedObjectValues[1]" = "Item 2";
 "jQC-12-UuK.ibShadowedObjectValues[2]" = "Item 3";
+"lblAcceptLeadingIntonations.title" = "在个别情况下，允许声调前置键入";
 "lblAlwaysShowTooltipTextsHorizontally.title" = "始终使用横排来显示工具提示视窗";
 "lblDevZoneIMKCandidate.title" = "IMK 选字窗依赖于 Apple 的私有 API，而且是借由桥接档案头强制曝露的方法使用的。目前，该功能仅在 macOS 10.14 Mojave 至 macOS 13 Ventura 系统内有测试过可用性。至于在未来的 macOS 发行版当中是否可用，则需要另行测试、才能下结论。";
 "lblDevZoneTitleDescription.title" = "警告：该页面仅作未来功能测试所用。\n在此列出的功能并非处于完全可用之状态。";
diff --git a/Source/WindowNIBs/zh-Hant.lproj/frmPrefWindow.strings b/Source/WindowNIBs/zh-Hant.lproj/frmPrefWindow.strings
index e372e795..77e0afa8 100644
--- a/Source/WindowNIBs/zh-Hant.lproj/frmPrefWindow.strings
+++ b/Source/WindowNIBs/zh-Hant.lproj/frmPrefWindow.strings
@@ -76,6 +76,7 @@
 "jQC-12-UuK.ibShadowedObjectValues[0]" = "Item 1";
 "jQC-12-UuK.ibShadowedObjectValues[1]" = "Item 2";
 "jQC-12-UuK.ibShadowedObjectValues[2]" = "Item 3";
+"lblAcceptLeadingIntonations.title" = "在個別情況下，允許聲調前置鍵入";
 "lblAlwaysShowTooltipTextsHorizontally.title" = "始終使用橫排來顯示工具提示視窗";
 "lblDevZoneIMKCandidate.title" = "IMK 選字窗依賴於 Apple 的私有 API，而且是藉由橋接檔案頭強制曝露的方法使用的。目前，該功能僅在 macOS 10.14 Mojave 至 macOS 13 Ventura 系統內有測試過可用性。至於在未來的 macOS 發行版當中是否可用，則需要另行測試、才能下結論。";
 "lblDevZoneTitleDescription.title" = "警告：該頁面僅作未來功能測試所用。\n在此列出的功能並非處於完全可用之狀態。";