diff --git a/java/res/values/donottranslate-altchars.xml b/java/res/values/donottranslate-altchars.xml
index 883ccb71d34a805c2a098eeb2c37c0eae4705e32..e77957578742dcbb221062545833f5e26278f21b 100644
--- a/java/res/values/donottranslate-altchars.xml
+++ b/java/res/values/donottranslate-altchars.xml
@@ -48,8 +48,8 @@
     <string name="alternates_for_currency_euro">¢,£,$,¥,₱</string>
     <string name="alternates_for_currency_pound">¢,$,€,¥,₱</string>
     <string name="alternates_for_smiley">":-)|:-) ,:-(|:-( ,;-)|;-) ,:-P|:-P ,=-O|=-O ,:-*|:-* ,:O|:O ,B-)|B-) ,:-$|:-$ ,:-!|:-! ,:-[|:-[ ,O:-)|O:-) ,:-\\\\\\\\|:-\\\\\\\\ ,:\'(|:\'( ,:-D|:-D "</string>
-    <string name="alternates_for_punctuation">"\?,!,\\,,:,-,\',\",(,),/,;,+,&amp;,\@"</string>
-    <string name="alternates_for_web_tab_punctuation">".,\?,!,\\,,:,-,\',\",(,),/,;,+,&amp;,\@"</string>
+    <string name="alternates_for_punctuation">"\\,,\?,!,:,-,\',\",(,),/,;,+,&amp;,\@"</string>
+    <string name="alternates_for_web_tab_punctuation">".,\\,,\?,!,:,-,\',\",(,),/,;,+,&amp;,\@"</string>
     <string name="keylabel_for_popular_domain">".com"</string>
     <!-- popular web domains for the locale - most popular, displayed on the keyboard -->
     <string name="alternates_for_popular_domain">".net,.org,.gov,.edu"</string>
diff --git a/java/src/com/android/inputmethod/keyboard/Key.java b/java/src/com/android/inputmethod/keyboard/Key.java
index 1b7e8ef21553b2b79dc6ab256721a09413f7224f..fb70b3579f650a535bd34c7391b8f46c5c21ba2b 100644
--- a/java/src/com/android/inputmethod/keyboard/Key.java
+++ b/java/src/com/android/inputmethod/keyboard/Key.java
@@ -338,10 +338,6 @@ public class Key {
         mPressed = false;
     }
 
-    public boolean isInside(int x, int y) {
-        return mKeyboard.isInside(this, x, y);
-    }
-
     /**
      * Detects if a point falls on this key.
      * @param x the x-coordinate of the point
diff --git a/java/src/com/android/inputmethod/keyboard/KeyDetector.java b/java/src/com/android/inputmethod/keyboard/KeyDetector.java
index 95ec93181cdaec76770c702adffce58976987cde..2eeae96b21d71285b3a2088833e42c57dcb58194 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyDetector.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyDetector.java
@@ -174,7 +174,7 @@ public class KeyDetector {
         int primaryIndex = NOT_A_KEY;
         for (final int index : mKeyboard.getNearestKeys(touchX, touchY)) {
             final Key key = keys.get(index);
-            final boolean isInside = key.isInside(touchX, touchY);
+            final boolean isInside = mKeyboard.isInside(key, touchX, touchY);
             final int distance = key.squaredDistanceToEdge(touchX, touchY);
             if (isInside || (mProximityCorrectOn && distance < mProximityThresholdSquare)) {
                 final int insertedPosition = sortNearbyKeys(index, distance);
diff --git a/java/src/com/android/inputmethod/keyboard/PointerTracker.java b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
index 249f6648bc339faa3f9e088d67f0380ad7f8482b..1b1aa492cabe197651077f523f70b73c3afd98aa 100644
--- a/java/src/com/android/inputmethod/keyboard/PointerTracker.java
+++ b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
@@ -560,15 +560,24 @@ public class PointerTracker {
         }
     }
 
-    private void showKeyPreview(int keyIndex) {
+    // The modifier key, such as shift key, should not show its key preview. If accessibility is
+    // turned on, the modifier key should show its key preview.
+    private boolean isKeyPreviewNotRequired(int keyIndex) {
         final Key key = getKey(keyIndex);
-        if (key != null && !key.mEnabled)
-            return;
-        // The modifier key, such as shift key, should not be shown as preview when multi-touch is
-        // supported. On the other hand, if multi-touch is not supported, the modifier key should
-        // be shown as preview. If accessibility is turned on, the modifier key should be shown as
-        // preview.
-        if (mHasDistinctMultitouch && isModifier() && !mIsAccessibilityEnabled)
+        if (!key.mEnabled)
+            return true;
+        if (mIsAccessibilityEnabled)
+            return false;
+        // Such as spacebar sliding language switch.
+        if (mKeyboard.needSpacebarPreview(keyIndex))
+            return false;
+        final int code = key.mCode;
+        return isModifierCode(code) || code == Keyboard.CODE_DELETE
+                || code == Keyboard.CODE_ENTER || code == Keyboard.CODE_SPACE;
+    }
+
+    private void showKeyPreview(int keyIndex) {
+        if (isKeyPreviewNotRequired(keyIndex))
             return;
         mProxy.showKeyPreview(keyIndex, this);
     }