diff --git a/java/res/values/config.xml b/java/res/values/config.xml
index bad4bc6..8b99a1f 100644
--- a/java/res/values/config.xml
+++ b/java/res/values/config.xml
@@ -38,7 +38,6 @@
     <bool name="config_default_bigram_prediction">false</bool>
     <bool name="config_default_sound_enabled">false</bool>
     <bool name="config_default_vibration_enabled">true</bool>
-    <bool name="config_auto_correction_spacebar_led_enabled">false</bool>
     <!-- Showing mini keyboard, just above the touched point if true, aligned to the key if false -->
     <bool name="config_show_mini_keyboard_at_touched_point">false</bool>
     <!-- The language is never displayed if == 0, always displayed if < 0 -->
diff --git a/java/res/values/styles.xml b/java/res/values/styles.xml
index 43aa583..2b5fb08 100644
--- a/java/res/values/styles.xml
+++ b/java/res/values/styles.xml
@@ -32,8 +32,7 @@
         <item name="maxMoreKeysColumn">@integer/config_max_more_keys_column</item>
     </style>
     <style name="LatinKeyboard">
-        <item name="autoCorrectionSpacebarLedEnabled">@bool/config_auto_correction_spacebar_led_enabled
-        </item>
+        <item name="autoCorrectionSpacebarLedEnabled">true</item>
         <item name="spacebarTextColor">#FFC0C0C0</item>
         <item name="spacebarTextShadowColor">#80000000</item>
     </style>
@@ -242,6 +241,7 @@
         name="LatinKeyboard.IceCreamSandwich"
         parent="LatinKeyboard"
     >
+        <item name="autoCorrectionSpacebarLedEnabled">false</item>
         <item name="disabledShortcutIcon">@drawable/sym_keyboard_voice_off_holo</item>
     </style>
     <style
diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
index 1f3006d..3d4a6ef 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardSwitcher.java
@@ -166,18 +166,29 @@
                 SettingsValues.getKeyPreviewPopupDismissDelay(mPrefs, mResources));
         final boolean localeChanged = (oldKeyboard == null)
                 || !keyboard.mId.mLocale.equals(oldKeyboard.mId.mLocale);
-        mInputMethodService.mHandler.startDisplayLanguageOnSpacebar(localeChanged);
+        if (keyboard instanceof LatinKeyboard) {
+            final LatinKeyboard latinKeyboard = (LatinKeyboard)keyboard;
+            latinKeyboard.updateAutoCorrectionState(mIsAutoCorrectionActive);
+            // If the cached keyboard had been switched to another keyboard while the language was
+            // displayed on its spacebar, it might have had arbitrary text fade factor. In such
+            // case, we should reset the text fade factor. It is also applicable to shortcut key.
+            latinKeyboard.updateSpacebarLanguage(0.0f,
+                    Utils.hasMultipleEnabledIMEsOrSubtypes(true /* include aux subtypes */),
+                    mSubtypeSwitcher.needsToDisplayLanguage(latinKeyboard.mId.mLocale));
+            latinKeyboard.updateShortcutKey(mSubtypeSwitcher.isShortcutImeReady());
+        }
         updateShiftState();
+        mInputMethodService.mHandler.startDisplayLanguageOnSpacebar(localeChanged);
     }
 
     // TODO: Move this method to KeyboardSet.
-    private LatinKeyboard getKeyboard(KeyboardId id) {
+    private LatinKeyboard getKeyboard(Context context, KeyboardId id) {
         final SoftReference<LatinKeyboard> ref = mKeyboardCache.get(id);
         LatinKeyboard keyboard = (ref == null) ? null : ref.get();
         if (keyboard == null) {
             final Locale savedLocale = LocaleUtils.setSystemLocale(mResources, id.mLocale);
             try {
-                final LatinKeyboard.Builder builder = new LatinKeyboard.Builder(mThemeContext);
+                final LatinKeyboard.Builder builder = new LatinKeyboard.Builder(context);
                 builder.load(id);
                 builder.setTouchPositionCorrectionEnabled(
                         mSubtypeSwitcher.currentSubtypeContainsExtraValueKey(
@@ -198,14 +209,8 @@
                     + " theme=" + themeName(keyboard.mThemeId));
         }
 
-        keyboard.onAutoCorrectionStateChanged(mIsAutoCorrectionActive);
         keyboard.setShiftLocked(false);
         keyboard.setShifted(false);
-        // If the cached keyboard had been switched to another keyboard while the language was
-        // displayed on its spacebar, it might have had arbitrary text fade factor. In such case,
-        // we should reset the text fade factor. It is also applicable to shortcut key.
-        keyboard.setSpacebarTextFadeFactor(0.0f, null);
-        keyboard.updateShortcutKey(mSubtypeSwitcher.isShortcutImeReady(), null);
         return keyboard;
     }
 
@@ -338,19 +343,19 @@
     // Implements {@link KeyboardState.SwitchActions}.
     @Override
     public void setSymbolsKeyboard() {
-        setKeyboard(getKeyboard(mKeyboardSet.mSymbolsId));
+        setKeyboard(getKeyboard(mThemeContext, mKeyboardSet.mSymbolsId));
     }
 
     // Implements {@link KeyboardState.SwitchActions}.
     @Override
     public void setAlphabetKeyboard() {
-        setKeyboard(getKeyboard(mKeyboardSet.mAlphabetId));
+        setKeyboard(getKeyboard(mThemeContext, mKeyboardSet.mAlphabetId));
     }
 
     // Implements {@link KeyboardState.SwitchActions}.
     @Override
     public void setSymbolsShiftedKeyboard() {
-        final Keyboard keyboard = getKeyboard(mKeyboardSet.mSymbolsShiftedId);
+        final Keyboard keyboard = getKeyboard(mThemeContext, mKeyboardSet.mSymbolsShiftedId);
         setKeyboard(keyboard);
         // TODO: Remove this logic once we introduce initial keyboard shift state attribute.
         // Symbol shift keyboard may have a shift key that has a caps lock style indicator (a.k.a.
@@ -451,12 +456,22 @@
         }
     }
 
+    public void onNetworkStateChanged() {
+        final LatinKeyboard keyboard = getLatinKeyboard();
+        if (keyboard == null) return;
+        final Key updatedKey = keyboard.updateShortcutKey(
+                SubtypeSwitcher.getInstance().isShortcutImeReady());
+        if (updatedKey != null && mKeyboardView != null) {
+            mKeyboardView.invalidateKey(updatedKey);
+        }
+    }
+
     public void onAutoCorrectionStateChanged(boolean isAutoCorrection) {
         if (mIsAutoCorrectionActive != isAutoCorrection) {
             mIsAutoCorrectionActive = isAutoCorrection;
             final LatinKeyboard keyboard = getLatinKeyboard();
             if (keyboard != null && keyboard.needsAutoCorrectionSpacebarLed()) {
-                final Key invalidatedKey = keyboard.onAutoCorrectionStateChanged(isAutoCorrection);
+                final Key invalidatedKey = keyboard.updateAutoCorrectionState(isAutoCorrection);
                 final LatinKeyboardView keyboardView = getKeyboardView();
                 if (keyboardView != null)
                     keyboardView.invalidateKey(invalidatedKey);
diff --git a/java/src/com/android/inputmethod/keyboard/LatinKeyboard.java b/java/src/com/android/inputmethod/keyboard/LatinKeyboard.java
index a9fcd9a..abb96f0 100644
--- a/java/src/com/android/inputmethod/keyboard/LatinKeyboard.java
+++ b/java/src/com/android/inputmethod/keyboard/LatinKeyboard.java
@@ -31,11 +31,9 @@
 import android.graphics.drawable.Drawable;
 import android.text.TextUtils;
 
-import com.android.inputmethod.compat.InputMethodManagerCompatWrapper;
 import com.android.inputmethod.keyboard.internal.KeyboardBuilder;
 import com.android.inputmethod.keyboard.internal.KeyboardParams;
 import com.android.inputmethod.latin.R;
-import com.android.inputmethod.latin.SubtypeSwitcher;
 import com.android.inputmethod.latin.Utils;
 
 import java.util.Arrays;
@@ -48,7 +46,6 @@
 
     private final Resources mRes;
     private final Theme mTheme;
-    private final SubtypeSwitcher mSubtypeSwitcher = SubtypeSwitcher.getInstance();
 
     /* Space key and its icons, drawables and colors. */
     private final Key mSpaceKey;
@@ -57,11 +54,15 @@
     private final Drawable mAutoCorrectionSpacebarLedIcon;
     private final int mSpacebarTextColor;
     private final int mSpacebarTextShadowColor;
-    private float mSpacebarTextFadeFactor = 0.0f;
     private final HashMap<Integer, BitmapDrawable> mSpaceDrawableCache =
             new HashMap<Integer, BitmapDrawable>();
     private final boolean mIsSpacebarTriggeringPopupByLongPress;
 
+    private boolean mAutoCorrectionSpacebarLedOn;
+    private boolean mMultipleEnabledIMEsOrSubtypes;
+    private boolean mNeedsToDisplayLanguage;
+    private float mSpacebarTextFadeFactor = 0.0f;
+
     /* Shortcut key and its icons if available */
     private final Key mShortcutKey;
     private final Drawable mEnabledShortcutIcon;
@@ -140,11 +141,13 @@
         }
     }
 
-    public void setSpacebarTextFadeFactor(float fadeFactor, KeyboardView view) {
+    public Key updateSpacebarLanguage(float fadeFactor, boolean multipleEnabledIMEsOrSubtypes,
+            boolean needsToDisplayLanguage) {
         mSpacebarTextFadeFactor = fadeFactor;
-        updateSpacebarForLocale(false);
-        if (view != null)
-            view.invalidateKey(mSpaceKey);
+        mMultipleEnabledIMEsOrSubtypes = multipleEnabledIMEsOrSubtypes;
+        mNeedsToDisplayLanguage = needsToDisplayLanguage;
+        updateSpacebarIcon();
+        return mSpaceKey;
     }
 
     private static int getSpacebarTextColor(int color, float fadeFactor) {
@@ -153,13 +156,12 @@
         return newColor;
     }
 
-    public void updateShortcutKey(boolean available, KeyboardView view) {
+    public Key updateShortcutKey(boolean available) {
         if (mShortcutKey == null)
-            return;
+            return null;
         mShortcutKey.setEnabled(available);
         mShortcutKey.setIcon(available ? mEnabledShortcutIcon : mDisabledShortcutIcon);
-        if (view != null)
-            view.invalidateKey(mShortcutKey);
+        return mShortcutKey;
     }
 
     public boolean needsAutoCorrectionSpacebarLed() {
@@ -169,8 +171,9 @@
     /**
      * @return a key which should be invalidated.
      */
-    public Key onAutoCorrectionStateChanged(boolean isAutoCorrection) {
-        updateSpacebarForLocale(isAutoCorrection);
+    public Key updateAutoCorrectionState(boolean isAutoCorrection) {
+        mAutoCorrectionSpacebarLedOn = isAutoCorrection;
+        updateSpacebarIcon();
         return mSpaceKey;
     }
 
@@ -183,19 +186,15 @@
         return label;
     }
 
-    private void updateSpacebarForLocale(boolean isAutoCorrection) {
+    private void updateSpacebarIcon() {
         if (mSpaceKey == null) return;
-        final InputMethodManagerCompatWrapper imm = InputMethodManagerCompatWrapper.getInstance();
-        if (imm == null) return;
-        // The "..." popup hint for triggering something by a long-pressing the spacebar
         final boolean shouldShowInputMethodPicker = mIsSpacebarTriggeringPopupByLongPress
-                && Utils.hasMultipleEnabledIMEsOrSubtypes(imm, true /* include aux subtypes */);
+                && mMultipleEnabledIMEsOrSubtypes;
         mSpaceKey.setNeedsSpecialPopupHint(shouldShowInputMethodPicker);
-        // If application locales are explicitly selected.
-        if (mSubtypeSwitcher.needsToDisplayLanguage(mId.mLocale)) {
-            mSpaceKey.setIcon(getSpaceDrawable(mId.mLocale, isAutoCorrection));
-        } else if (isAutoCorrection) {
-            mSpaceKey.setIcon(getSpaceDrawable(null, true));
+        if (mNeedsToDisplayLanguage) {
+            mSpaceKey.setIcon(getSpaceDrawable(mId.mLocale));
+        } else if (mAutoCorrectionSpacebarLedOn) {
+            mSpaceKey.setIcon(getSpaceDrawable(null));
         } else {
             mSpaceKey.setIcon(mSpaceIcon);
         }
@@ -245,15 +244,15 @@
         return language;
     }
 
-    private BitmapDrawable getSpaceDrawable(Locale locale, boolean isAutoCorrection) {
+    private BitmapDrawable getSpaceDrawable(Locale locale) {
         final Integer hashCode = Arrays.hashCode(
-                new Object[] { locale, isAutoCorrection, mSpacebarTextFadeFactor });
+                new Object[] { locale, mAutoCorrectionSpacebarLedOn, mSpacebarTextFadeFactor });
         final BitmapDrawable cached = mSpaceDrawableCache.get(hashCode);
         if (cached != null) {
             return cached;
         }
         final BitmapDrawable drawable = new BitmapDrawable(mRes, drawSpacebar(
-                locale, isAutoCorrection, mSpacebarTextFadeFactor));
+                locale, mAutoCorrectionSpacebarLedOn, mSpacebarTextFadeFactor));
         mSpaceDrawableCache.put(hashCode, drawable);
         return drawable;
     }
diff --git a/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java b/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java
index 7f2c6c5..49b8ce7 100644
--- a/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/LatinKeyboardView.java
@@ -373,15 +373,6 @@
         return miniKeyboardView;
     }
 
-    public void setSpacebarTextFadeFactor(float fadeFactor, LatinKeyboard oldKeyboard) {
-        final Keyboard keyboard = getKeyboard();
-        // We should not set text fade factor to the keyboard which does not display the language on
-        // its spacebar.
-        if (keyboard instanceof LatinKeyboard && keyboard == oldKeyboard) {
-            ((LatinKeyboard)keyboard).setSpacebarTextFadeFactor(fadeFactor, this);
-        }
-    }
-
     /**
      * Called when a key is long pressed. By default this will open mini keyboard associated
      * with this key.
diff --git a/java/src/com/android/inputmethod/latin/ExpandableDictionary.java b/java/src/com/android/inputmethod/latin/ExpandableDictionary.java
index cad69bb..7eec8e2 100644
--- a/java/src/com/android/inputmethod/latin/ExpandableDictionary.java
+++ b/java/src/com/android/inputmethod/latin/ExpandableDictionary.java
@@ -51,6 +51,7 @@
     private Object mUpdatingLock = new Object();
 
     private static class Node {
+        Node() {}
         char mCode;
         int mFrequency;
         boolean mTerminal;
@@ -547,6 +548,7 @@
     }
 
     private class LoadDictionaryTask extends Thread {
+        LoadDictionaryTask() {}
         @Override
         public void run() {
             loadDictionaryAsync();
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index 943361c..20c87ad 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -297,19 +297,15 @@
                         || (switcher.isAlphabetMode() && switcher.isShiftedOrShiftLocked()));
                 break;
             case MSG_FADEOUT_LANGUAGE_ON_SPACEBAR:
-                if (inputView != null) {
-                    inputView.setSpacebarTextFadeFactor(
-                            (1.0f + mFinalFadeoutFactorOfLanguageOnSpacebar) / 2,
-                            (LatinKeyboard)msg.obj);
-                }
+                setSpacebarTextFadeFactor(inputView,
+                        (1.0f + mFinalFadeoutFactorOfLanguageOnSpacebar) / 2,
+                        (LatinKeyboard)msg.obj);
                 sendMessageDelayed(obtainMessage(MSG_DISMISS_LANGUAGE_ON_SPACEBAR, msg.obj),
                         mDurationOfFadeoutLanguageOnSpacebar);
                 break;
             case MSG_DISMISS_LANGUAGE_ON_SPACEBAR:
-                if (inputView != null) {
-                    inputView.setSpacebarTextFadeFactor(mFinalFadeoutFactorOfLanguageOnSpacebar,
-                            (LatinKeyboard)msg.obj);
-                }
+                setSpacebarTextFadeFactor(inputView, mFinalFadeoutFactorOfLanguageOnSpacebar,
+                        (LatinKeyboard)msg.obj);
                 break;
             }
         }
@@ -349,6 +345,19 @@
             sendMessage(obtainMessage(MSG_VOICE_RESULTS));
         }
 
+        private static void setSpacebarTextFadeFactor(LatinKeyboardView inputView,
+                float fadeFactor, LatinKeyboard oldKeyboard) {
+            if (inputView == null) return;
+            final Keyboard keyboard = inputView.getKeyboard();
+            if (keyboard instanceof LatinKeyboard && keyboard == oldKeyboard) {
+                final Key updatedKey = ((LatinKeyboard)keyboard).updateSpacebarLanguage(
+                        fadeFactor,
+                        Utils.hasMultipleEnabledIMEsOrSubtypes(true /* include aux subtypes */),
+                        SubtypeSwitcher.getInstance().needsToDisplayLanguage(keyboard.mId.mLocale));
+                inputView.invalidateKey(updatedKey);
+            }
+        }
+
         public void startDisplayLanguageOnSpacebar(boolean localeChanged) {
             final LatinIME latinIme = getOuterInstance();
             removeMessages(MSG_FADEOUT_LANGUAGE_ON_SPACEBAR);
@@ -361,9 +370,9 @@
                         || mDelayBeforeFadeoutLanguageOnSpacebar < 0;
                 // The language is never displayed when the delay is zero.
                 if (mDelayBeforeFadeoutLanguageOnSpacebar != 0) {
-                    inputView.setSpacebarTextFadeFactor(needsToDisplayLanguage ? 1.0f
-                            : mFinalFadeoutFactorOfLanguageOnSpacebar,
-                            keyboard);
+                    setSpacebarTextFadeFactor(inputView,
+                            needsToDisplayLanguage ? 1.0f : mFinalFadeoutFactorOfLanguageOnSpacebar,
+                                    keyboard);
                 }
                 // The fadeout animation will start when the delay is positive.
                 if (localeChanged && mDelayBeforeFadeoutLanguageOnSpacebar > 0) {
@@ -1229,7 +1238,7 @@
         if (isShowingOptionDialog()) return;
         if (InputMethodServiceCompatWrapper.CAN_HANDLE_ON_CURRENT_INPUT_METHOD_SUBTYPE_CHANGED) {
             showSubtypeSelectorAndSettings();
-        } else if (Utils.hasMultipleEnabledIMEsOrSubtypes(mImm, false /* exclude aux subtypes */)) {
+        } else if (Utils.hasMultipleEnabledIMEsOrSubtypes(false /* exclude aux subtypes */)) {
             showOptionsMenu();
         } else {
             launchSettings();
@@ -1245,7 +1254,7 @@
         if (isShowingOptionDialog()) return false;
         switch (requestCode) {
         case CODE_SHOW_INPUT_METHOD_PICKER:
-            if (Utils.hasMultipleEnabledIMEsOrSubtypes(mImm, true /* include aux subtypes */)) {
+            if (Utils.hasMultipleEnabledIMEsOrSubtypes(true /* include aux subtypes */)) {
                 mImm.showInputMethodPicker();
                 return true;
             }
diff --git a/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java b/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java
index 8a48620..4211182 100644
--- a/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java
+++ b/java/src/com/android/inputmethod/latin/SubtypeSwitcher.java
@@ -35,7 +35,6 @@
 import com.android.inputmethod.compat.InputMethodSubtypeCompatWrapper;
 import com.android.inputmethod.deprecated.VoiceProxy;
 import com.android.inputmethod.keyboard.KeyboardSwitcher;
-import com.android.inputmethod.keyboard.LatinKeyboard;
 
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -421,11 +420,7 @@
                 ConnectivityManager.EXTRA_NO_CONNECTIVITY, false);
         mIsNetworkConnected = !noConnection;
 
-        final KeyboardSwitcher switcher = KeyboardSwitcher.getInstance();
-        final LatinKeyboard keyboard = switcher.getLatinKeyboard();
-        if (keyboard != null) {
-            keyboard.updateShortcutKey(isShortcutImeReady(), switcher.getKeyboardView());
-        }
+        KeyboardSwitcher.getInstance().onNetworkStateChanged();
     }
 
     //////////////////////////////////
diff --git a/java/src/com/android/inputmethod/latin/SuggestionsView.java b/java/src/com/android/inputmethod/latin/SuggestionsView.java
index 883bb57..47c7900 100644
--- a/java/src/com/android/inputmethod/latin/SuggestionsView.java
+++ b/java/src/com/android/inputmethod/latin/SuggestionsView.java
@@ -461,6 +461,91 @@
             setLayoutWeight(
                     hintView, 1.0f - mCenterSuggestionWeight, ViewGroup.LayoutParams.MATCH_PARENT);
         }
+
+        private static CharSequence getDebugInfo(SuggestedWords suggestions, int pos) {
+            if (DBG && pos < suggestions.size()) {
+                final SuggestedWordInfo wordInfo = suggestions.getInfo(pos);
+                if (wordInfo != null) {
+                    final CharSequence debugInfo = wordInfo.getDebugString();
+                    if (!TextUtils.isEmpty(debugInfo)) {
+                        return debugInfo;
+                    }
+                }
+            }
+            return null;
+        }
+
+        private static void setLayoutWeight(View v, float weight, int height) {
+            final ViewGroup.LayoutParams lp = v.getLayoutParams();
+            if (lp instanceof LinearLayout.LayoutParams) {
+                final LinearLayout.LayoutParams llp = (LinearLayout.LayoutParams)lp;
+                llp.weight = weight;
+                llp.width = 0;
+                llp.height = height;
+            }
+        }
+
+        private static float getTextScaleX(CharSequence text, int maxWidth, TextPaint paint) {
+            paint.setTextScaleX(1.0f);
+            final int width = getTextWidth(text, paint);
+            if (width <= maxWidth) {
+                return 1.0f;
+            }
+            return maxWidth / (float)width;
+        }
+
+        private static CharSequence getEllipsizedText(CharSequence text, int maxWidth,
+                TextPaint paint) {
+            if (text == null) return null;
+            paint.setTextScaleX(1.0f);
+            final int width = getTextWidth(text, paint);
+            if (width <= maxWidth) {
+                return text;
+            }
+            final float scaleX = maxWidth / (float)width;
+            if (scaleX >= MIN_TEXT_XSCALE) {
+                paint.setTextScaleX(scaleX);
+                return text;
+            }
+
+            // Note that TextUtils.ellipsize() use text-x-scale as 1.0 if ellipsize is needed. To
+            // get squeezed and ellipsized text, passes enlarged width (maxWidth / MIN_TEXT_XSCALE).
+            final CharSequence ellipsized = TextUtils.ellipsize(
+                    text, paint, maxWidth / MIN_TEXT_XSCALE, TextUtils.TruncateAt.MIDDLE);
+            paint.setTextScaleX(MIN_TEXT_XSCALE);
+            return ellipsized;
+        }
+
+        private static int getTextWidth(CharSequence text, TextPaint paint) {
+            if (TextUtils.isEmpty(text)) return 0;
+            final Typeface savedTypeface = paint.getTypeface();
+            paint.setTypeface(getTextTypeface(text));
+            final int len = text.length();
+            final float[] widths = new float[len];
+            final int count = paint.getTextWidths(text, 0, len, widths);
+            int width = 0;
+            for (int i = 0; i < count; i++) {
+                width += Math.round(widths[i] + 0.5f);
+            }
+            paint.setTypeface(savedTypeface);
+            return width;
+        }
+
+        private static Typeface getTextTypeface(CharSequence text) {
+            if (!(text instanceof SpannableString))
+                return Typeface.DEFAULT;
+
+            final SpannableString ss = (SpannableString)text;
+            final StyleSpan[] styles = ss.getSpans(0, text.length(), StyleSpan.class);
+            if (styles.length == 0)
+                return Typeface.DEFAULT;
+
+            switch (styles[0].getStyle()) {
+            case Typeface.BOLD: return Typeface.DEFAULT_BOLD;
+            // TODO: BOLD_ITALIC, ITALIC case?
+            default: return Typeface.DEFAULT;
+            }
+        }
     }
 
     /**
@@ -547,90 +632,6 @@
         mParams.layout(mSuggestions, mSuggestionsStrip, this, getWidth());
     }
 
-    private static CharSequence getDebugInfo(SuggestedWords suggestions, int pos) {
-        if (DBG && pos < suggestions.size()) {
-            final SuggestedWordInfo wordInfo = suggestions.getInfo(pos);
-            if (wordInfo != null) {
-                final CharSequence debugInfo = wordInfo.getDebugString();
-                if (!TextUtils.isEmpty(debugInfo)) {
-                    return debugInfo;
-                }
-            }
-        }
-        return null;
-    }
-
-    private static void setLayoutWeight(View v, float weight, int height) {
-        final ViewGroup.LayoutParams lp = v.getLayoutParams();
-        if (lp instanceof LinearLayout.LayoutParams) {
-            final LinearLayout.LayoutParams llp = (LinearLayout.LayoutParams)lp;
-            llp.weight = weight;
-            llp.width = 0;
-            llp.height = height;
-        }
-    }
-
-    private static float getTextScaleX(CharSequence text, int maxWidth, TextPaint paint) {
-        paint.setTextScaleX(1.0f);
-        final int width = getTextWidth(text, paint);
-        if (width <= maxWidth) {
-            return 1.0f;
-        }
-        return maxWidth / (float)width;
-    }
-
-    private static CharSequence getEllipsizedText(CharSequence text, int maxWidth,
-            TextPaint paint) {
-        if (text == null) return null;
-        paint.setTextScaleX(1.0f);
-        final int width = getTextWidth(text, paint);
-        if (width <= maxWidth) {
-            return text;
-        }
-        final float scaleX = maxWidth / (float)width;
-        if (scaleX >= MIN_TEXT_XSCALE) {
-            paint.setTextScaleX(scaleX);
-            return text;
-        }
-
-        // Note that TextUtils.ellipsize() use text-x-scale as 1.0 if ellipsize is needed. To get
-        // squeezed and ellipsized text, passes enlarged width (maxWidth / MIN_TEXT_XSCALE).
-        final CharSequence ellipsized = TextUtils.ellipsize(
-                text, paint, maxWidth / MIN_TEXT_XSCALE, TextUtils.TruncateAt.MIDDLE);
-        paint.setTextScaleX(MIN_TEXT_XSCALE);
-        return ellipsized;
-    }
-
-    private static int getTextWidth(CharSequence text, TextPaint paint) {
-        if (TextUtils.isEmpty(text)) return 0;
-        final Typeface savedTypeface = paint.getTypeface();
-        paint.setTypeface(getTextTypeface(text));
-        final int len = text.length();
-        final float[] widths = new float[len];
-        final int count = paint.getTextWidths(text, 0, len, widths);
-        int width = 0;
-        for (int i = 0; i < count; i++) {
-            width += Math.round(widths[i] + 0.5f);
-        }
-        paint.setTypeface(savedTypeface);
-        return width;
-    }
-
-    private static Typeface getTextTypeface(CharSequence text) {
-        if (!(text instanceof SpannableString))
-            return Typeface.DEFAULT;
-
-        final SpannableString ss = (SpannableString)text;
-        final StyleSpan[] styles = ss.getSpans(0, text.length(), StyleSpan.class);
-        if (styles.length == 0)
-            return Typeface.DEFAULT;
-
-        switch (styles[0].getStyle()) {
-        case Typeface.BOLD: return Typeface.DEFAULT_BOLD;
-        // TODO: BOLD_ITALIC, ITALIC case?
-        default: return Typeface.DEFAULT;
-        }
-    }
 
     public boolean isShowingAddToDictionaryHint() {
         return mSuggestionsStrip.getChildCount() > 0
diff --git a/java/src/com/android/inputmethod/latin/UserDictionary.java b/java/src/com/android/inputmethod/latin/UserDictionary.java
index 8c28324..6d6296e 100644
--- a/java/src/com/android/inputmethod/latin/UserDictionary.java
+++ b/java/src/com/android/inputmethod/latin/UserDictionary.java
@@ -18,13 +18,10 @@
 
 import android.content.ContentProviderClient;
 import android.content.ContentResolver;
-import android.content.ContentValues;
 import android.content.Context;
 import android.content.Intent;
 import android.database.ContentObserver;
 import android.database.Cursor;
-import android.net.Uri;
-import android.os.RemoteException;
 import android.provider.UserDictionary.Words;
 import android.text.TextUtils;
 
diff --git a/java/src/com/android/inputmethod/latin/Utils.java b/java/src/com/android/inputmethod/latin/Utils.java
index 64f4d05..bfa5189 100644
--- a/java/src/com/android/inputmethod/latin/Utils.java
+++ b/java/src/com/android/inputmethod/latin/Utils.java
@@ -118,8 +118,9 @@
     }
 
     public static boolean hasMultipleEnabledIMEsOrSubtypes(
-            final InputMethodManagerCompatWrapper imm,
             final boolean shouldIncludeAuxiliarySubtypes) {
+        final InputMethodManagerCompatWrapper imm = InputMethodManagerCompatWrapper.getInstance();
+        if (imm == null) return false;
         final List<InputMethodInfoCompatWrapper> enabledImis = imm.getEnabledInputMethodList();
 
         // Number of the filtered IMEs
@@ -543,13 +544,13 @@
                     final String currentDateTimeString =
                             new SimpleDateFormat("yyyyMMdd-HHmmssZ").format(date);
                     if (mFile == null) {
-                        Log.w(TAG, "No internal log file found.");
+                        Log.w(USABILITY_TAG, "No internal log file found.");
                         return;
                     }
                     if (mIms.checkCallingOrSelfPermission(
                                 android.Manifest.permission.WRITE_EXTERNAL_STORAGE)
                                         != PackageManager.PERMISSION_GRANTED) {
-                        Log.w(TAG, "Doesn't have the permission WRITE_EXTERNAL_STORAGE");
+                        Log.w(USABILITY_TAG, "Doesn't have the permission WRITE_EXTERNAL_STORAGE");
                         return;
                     }
                     mWriter.flush();
@@ -563,20 +564,20 @@
                         src.close();
                         dest.close();
                     } catch (FileNotFoundException e1) {
-                        Log.w(TAG, e1);
+                        Log.w(USABILITY_TAG, e1);
                         return;
                     } catch (IOException e2) {
-                        Log.w(TAG, e2);
+                        Log.w(USABILITY_TAG, e2);
                         return;
                     }
                     if (destFile == null || !destFile.exists()) {
-                        Log.w(TAG, "Dest file doesn't exist.");
+                        Log.w(USABILITY_TAG, "Dest file doesn't exist.");
                         return;
                     }
                     final Intent intent = new Intent(Intent.ACTION_SEND);
                     intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);
                     if (LatinImeLogger.sDBG) {
-                        Log.d(TAG, "Destination file URI is " + destFile.toURI());
+                        Log.d(USABILITY_TAG, "Destination file URI is " + destFile.toURI());
                     }
                     intent.setType("text/plain");
                     intent.putExtra(Intent.EXTRA_STREAM, Uri.parse("file://" + destPath));
diff --git a/java/src/com/android/inputmethod/latin/WordComposer.java b/java/src/com/android/inputmethod/latin/WordComposer.java
index 8bbcff7..60a9685 100644
--- a/java/src/com/android/inputmethod/latin/WordComposer.java
+++ b/java/src/com/android/inputmethod/latin/WordComposer.java
@@ -32,15 +32,40 @@
     public static final int NOT_A_CODE = KeyDetector.NOT_A_CODE;
     public static final int NOT_A_COORDINATE = -1;
 
-    /**
-     * The list of unicode values for each keystroke (including surrounding keys)
-     */
-    private ArrayList<int[]> mCodes;
+    // Storage for all the info about the current input.
+    private static class CharacterStore {
+        /**
+         * The list of unicode values for each keystroke (including surrounding keys)
+         */
+        ArrayList<int[]> mCodes;
+        int[] mXCoordinates;
+        int[] mYCoordinates;
+        StringBuilder mTypedWord;
+        CharacterStore() {
+            final int N = BinaryDictionary.MAX_WORD_LENGTH;
+            mCodes = new ArrayList<int[]>(N);
+            mTypedWord = new StringBuilder(N);
+            mXCoordinates = new int[N];
+            mYCoordinates = new int[N];
+        }
+        CharacterStore(final CharacterStore that) {
+            mCodes = new ArrayList<int[]>(that.mCodes);
+            mTypedWord = new StringBuilder(that.mTypedWord);
+            mXCoordinates = Arrays.copyOf(that.mXCoordinates, that.mXCoordinates.length);
+            mYCoordinates = Arrays.copyOf(that.mYCoordinates, that.mYCoordinates.length);
+        }
+        void reset() {
+            // For better performance than creating a new character store.
+            mCodes.clear();
+            mTypedWord.setLength(0);
+        }
+    }
 
-    private int[] mXCoordinates;
-    private int[] mYCoordinates;
-
-    private StringBuilder mTypedWord;
+    // The currently typing word.
+    // NOTE: this is not reset as soon as the word is committed because it may be needed again
+    // to resume suggestion if backspaced. TODO: separate cleanly what is actually being
+    // composed and what is kept for possible resuming.
+    private CharacterStore mCurrentWord;
     // An auto-correction for this word out of the dictionary.
     private CharSequence mAutoCorrection;
 
@@ -56,11 +81,7 @@
     private boolean mIsFirstCharCapitalized;
 
     public WordComposer() {
-        final int N = BinaryDictionary.MAX_WORD_LENGTH;
-        mCodes = new ArrayList<int[]>(N);
-        mTypedWord = new StringBuilder(N);
-        mXCoordinates = new int[N];
-        mYCoordinates = new int[N];
+        mCurrentWord = new CharacterStore();
         mTrailingSingleQuotesCount = 0;
         mAutoCorrection = null;
     }
@@ -70,10 +91,7 @@
     }
 
     public void init(WordComposer source) {
-        mCodes = new ArrayList<int[]>(source.mCodes);
-        mTypedWord = new StringBuilder(source.mTypedWord);
-        mXCoordinates = Arrays.copyOf(source.mXCoordinates, source.mXCoordinates.length);
-        mYCoordinates = Arrays.copyOf(source.mYCoordinates, source.mYCoordinates.length);
+        mCurrentWord = new CharacterStore(source.mCurrentWord);
         mCapsCount = source.mCapsCount;
         mIsFirstCharCapitalized = source.mIsFirstCharCapitalized;
         mAutoCapitalized = source.mAutoCapitalized;
@@ -85,8 +103,7 @@
      * Clear out the keys registered so far.
      */
     public void reset() {
-        mCodes.clear();
-        mTypedWord.setLength(0);
+        mCurrentWord.reset();
         mCapsCount = 0;
         mIsFirstCharCapitalized = false;
         mTrailingSingleQuotesCount = 0;
@@ -98,7 +115,7 @@
      * @return the number of keystrokes
      */
     public final int size() {
-        return mTypedWord.length();
+        return mCurrentWord.mTypedWord.length();
     }
 
     /**
@@ -107,15 +124,15 @@
      * @return the unicode for the pressed and surrounding keys
      */
     public int[] getCodesAt(int index) {
-        return mCodes.get(index);
+        return mCurrentWord.mCodes.get(index);
     }
 
     public int[] getXCoordinates() {
-        return mXCoordinates;
+        return mCurrentWord.mXCoordinates;
     }
 
     public int[] getYCoordinates() {
-        return mYCoordinates;
+        return mCurrentWord.mYCoordinates;
     }
 
     private static boolean isFirstCharCapitalized(int index, int codePoint, boolean previous) {
@@ -130,12 +147,12 @@
      */
     public void add(int primaryCode, int[] codes, int x, int y) {
         final int newIndex = size();
-        mTypedWord.append((char) primaryCode);
+        mCurrentWord.mTypedWord.append((char) primaryCode);
         correctPrimaryJuxtapos(primaryCode, codes);
-        mCodes.add(codes);
+        mCurrentWord.mCodes.add(codes);
         if (newIndex < BinaryDictionary.MAX_WORD_LENGTH) {
-            mXCoordinates[newIndex] = x;
-            mYCoordinates[newIndex] = y;
+            mCurrentWord.mXCoordinates[newIndex] = x;
+            mCurrentWord.mYCoordinates[newIndex] = y;
         }
         mIsFirstCharCapitalized = isFirstCharCapitalized(
                 newIndex, primaryCode, mIsFirstCharCapitalized);
@@ -215,9 +232,9 @@
         final int size = size();
         if (size > 0) {
             final int lastPos = size - 1;
-            char lastChar = mTypedWord.charAt(lastPos);
-            mCodes.remove(lastPos);
-            mTypedWord.deleteCharAt(lastPos);
+            char lastChar = mCurrentWord.mTypedWord.charAt(lastPos);
+            mCurrentWord.mCodes.remove(lastPos);
+            mCurrentWord.mTypedWord.deleteCharAt(lastPos);
             if (Character.isUpperCase(lastChar)) mCapsCount--;
         }
         if (size() == 0) {
@@ -226,8 +243,8 @@
         if (mTrailingSingleQuotesCount > 0) {
             --mTrailingSingleQuotesCount;
         } else {
-            for (int i = mTypedWord.length() - 1; i >= 0; --i) {
-                if (Keyboard.CODE_SINGLE_QUOTE != mTypedWord.codePointAt(i)) break;
+            for (int i = mCurrentWord.mTypedWord.length() - 1; i >= 0; --i) {
+                if (Keyboard.CODE_SINGLE_QUOTE != mCurrentWord.mTypedWord.codePointAt(i)) break;
                 ++mTrailingSingleQuotesCount;
             }
         }
@@ -239,7 +256,7 @@
      * @return the word that was typed so far. Never returns null.
      */
     public String getTypedWord() {
-        return mTypedWord.toString();
+        return mCurrentWord.mTypedWord.toString();
     }
 
     /**
diff --git a/java/src/com/android/inputmethod/latin/spellcheck/SpellCheckerProximityInfo.java b/java/src/com/android/inputmethod/latin/spellcheck/SpellCheckerProximityInfo.java
index 9a2bebf..2bc2cfd 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/SpellCheckerProximityInfo.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/SpellCheckerProximityInfo.java
@@ -43,7 +43,7 @@
         return result;
     }
 
-    static class Latin {
+    private static class Latin {
         // This is a map from the code point to the index in the PROXIMITY array.
         // At the time the native code to read the binary dictionary needs the proximity info be
         // passed as a flat array spaced by MAX_PROXIMITY_CHARS_SIZE columns, one for each input
@@ -62,7 +62,7 @@
         // to spell check has been entered with one of the keyboards above. Also, specifically
         // to English, many spelling errors consist of the last vowel of the word being wrong
         // because in English vowels tend to merge with each other in pronunciation.
-        final private static int[] PROXIMITY = {
+        final static int[] PROXIMITY = {
             'q', 'w', 's', 'a', 'z', NUL, NUL, NUL, NUL, NUL, NUL, NUL, NUL, NUL, NUL, NUL,
             'w', 'q', 'a', 's', 'd', 'e', 'x', NUL, NUL, NUL, NUL, NUL, NUL, NUL, NUL, NUL,
             'e', 'w', 's', 'd', 'f', 'r', 'a', 'i', 'o', 'u', NUL, NUL, NUL, NUL, NUL, NUL,
@@ -101,14 +101,14 @@
         static {
             buildProximityIndices(PROXIMITY, INDICES);
         }
-        private static int getIndexOf(int characterCode) {
+        static int getIndexOf(int characterCode) {
             return computeIndex(characterCode, INDICES);
         }
     }
 
-    static class Cyrillic {
+    private static class Cyrillic {
         final private static TreeMap<Integer, Integer> INDICES = new TreeMap<Integer, Integer>();
-        final private static int[] PROXIMITY = {
+        final static int[] PROXIMITY = {
             // TODO: This table is solely based on the keyboard layout. Consult with Russian
             // speakers on commonly misspelled words/letters.
             'й', 'ц', 'ф', 'ы', NUL, NUL, NUL, NUL, NUL, NUL, NUL, NUL, NUL, NUL, NUL, NUL,
@@ -150,7 +150,7 @@
         static {
             buildProximityIndices(PROXIMITY, INDICES);
         }
-        private static int getIndexOf(int characterCode) {
+        static int getIndexOf(int characterCode) {
             return computeIndex(characterCode, INDICES);
         }
     }
diff --git a/native/src/correction.cpp b/native/src/correction.cpp
index 22ee75a..2da82dc 100644
--- a/native/src/correction.cpp
+++ b/native/src/correction.cpp
@@ -32,48 +32,6 @@
 // edit distance funcitons //
 /////////////////////////////
 
-#if 0 /* no longer used */
-inline static int editDistance(
-        int* editDistanceTable, const unsigned short* input,
-        const int inputLength, const unsigned short* output, const int outputLength) {
-    // dp[li][lo] dp[a][b] = dp[ a * lo + b]
-    int* dp = editDistanceTable;
-    const int li = inputLength + 1;
-    const int lo = outputLength + 1;
-    for (int i = 0; i < li; ++i) {
-        dp[lo * i] = i;
-    }
-    for (int i = 0; i < lo; ++i) {
-        dp[i] = i;
-    }
-
-    for (int i = 0; i < li - 1; ++i) {
-        for (int j = 0; j < lo - 1; ++j) {
-            const uint32_t ci = toBaseLowerCase(input[i]);
-            const uint32_t co = toBaseLowerCase(output[j]);
-            const uint16_t cost = (ci == co) ? 0 : 1;
-            dp[(i + 1) * lo + (j + 1)] = min(dp[i * lo + (j + 1)] + 1,
-                    min(dp[(i + 1) * lo + j] + 1, dp[i * lo + j] + cost));
-            if (i > 0 && j > 0 && ci == toBaseLowerCase(output[j - 1])
-                    && co == toBaseLowerCase(input[i - 1])) {
-                dp[(i + 1) * lo + (j + 1)] = min(
-                        dp[(i + 1) * lo + (j + 1)], dp[(i - 1) * lo + (j - 1)] + cost);
-            }
-        }
-    }
-
-    if (DEBUG_EDIT_DISTANCE) {
-        LOGI("IN = %d, OUT = %d", inputLength, outputLength);
-        for (int i = 0; i < li; ++i) {
-            for (int j = 0; j < lo; ++j) {
-                LOGI("EDIT[%d][%d], %d", i, j, dp[i * lo + j]);
-            }
-        }
-    }
-    return dp[li * lo - 1];
-}
-#endif
-
 inline static void initEditDistance(int *editDistanceTable) {
     for (int i = 0; i <= MAX_WORD_LENGTH_INTERNAL; ++i) {
         editDistanceTable[i] = i;
@@ -145,7 +103,7 @@
 
 void Correction::setCorrectionParams(const int skipPos, const int excessivePos,
         const int transposedPos, const int spaceProximityPos, const int missingSpacePos,
-        const bool useFullEditDistance) {
+        const bool useFullEditDistance, const bool doAutoCompletion, const int maxErrors) {
     // TODO: remove
     mTransposedPos = transposedPos;
     mExcessivePos = excessivePos;
@@ -158,6 +116,8 @@
     mSpaceProximityPos = spaceProximityPos;
     mMissingSpacePos = missingSpacePos;
     mUseFullEditDistance = useFullEditDistance;
+    mDoAutoCompletion = doAutoCompletion;
+    mMaxErrors = maxErrors;
 }
 
 void Correction::checkState() {
@@ -279,7 +239,9 @@
 
 bool Correction::needsToPrune() const {
     // TODO: use edit distance here
-    return mOutputIndex - 1 >= mMaxDepth || mProximityCount > mMaxEditDistance;
+    return mOutputIndex - 1 >= mMaxDepth || mProximityCount > mMaxEditDistance
+            // Allow one char longer word for missing character
+            || (!mDoAutoCompletion && (mOutputIndex + 1 >= mInputLength));
 }
 
 void Correction::addCharToCurrentWord(const int32_t c) {
@@ -311,12 +273,17 @@
 Correction::CorrectionType Correction::processCharAndCalcState(
         const int32_t c, const bool isTerminal) {
     const int correctionCount = (mSkippedCount + mExcessiveCount + mTransposedCount);
+    if (correctionCount > mMaxErrors) {
+        return UNRELATED;
+    }
+
     // TODO: Change the limit if we'll allow two or more corrections
     const bool noCorrectionsHappenedSoFar = correctionCount == 0;
     const bool canTryCorrection = noCorrectionsHappenedSoFar;
     int proximityIndex = 0;
     mDistances[mOutputIndex] = NOT_A_DISTANCE;
 
+    // Skip checking this node
     if (mNeedsToTraverseAllNodes || isQuote(c)) {
         bool incremented = false;
         if (mLastCharExceeded && mInputIndex == mInputLength - 1) {
@@ -341,6 +308,7 @@
         return processSkipChar(c, isTerminal, incremented);
     }
 
+    // Check possible corrections.
     if (mExcessivePos >= 0) {
         if (mExcessiveCount == 0 && mExcessivePos < mOutputIndex) {
             mExcessivePos = mOutputIndex;
@@ -391,7 +359,12 @@
     }
 
     // TODO: Change the limit if we'll allow two or more proximity chars with corrections
-    const bool checkProximityChars = noCorrectionsHappenedSoFar ||  mProximityCount == 0;
+    // Work around: When the mMaxErrors is 1, we only allow just one error
+    // including proximity correction.
+    const bool checkProximityChars = (mMaxErrors > 1)
+            ? (noCorrectionsHappenedSoFar || mProximityCount == 0)
+            : (noCorrectionsHappenedSoFar && mProximityCount == 0);
+
     ProximityInfo::ProximityType matchedProximityCharId = secondTransposing
             ? ProximityInfo::EQUIVALENT_CHAR
             : mProximityInfo->getMatchedProximityId(
@@ -931,4 +904,46 @@
     return totalFreq;
 }
 
+#if 0 /* no longer used. keep just for reference */
+inline static int editDistance(
+        int* editDistanceTable, const unsigned short* input,
+        const int inputLength, const unsigned short* output, const int outputLength) {
+    // dp[li][lo] dp[a][b] = dp[ a * lo + b]
+    int* dp = editDistanceTable;
+    const int li = inputLength + 1;
+    const int lo = outputLength + 1;
+    for (int i = 0; i < li; ++i) {
+        dp[lo * i] = i;
+    }
+    for (int i = 0; i < lo; ++i) {
+        dp[i] = i;
+    }
+
+    for (int i = 0; i < li - 1; ++i) {
+        for (int j = 0; j < lo - 1; ++j) {
+            const uint32_t ci = toBaseLowerCase(input[i]);
+            const uint32_t co = toBaseLowerCase(output[j]);
+            const uint16_t cost = (ci == co) ? 0 : 1;
+            dp[(i + 1) * lo + (j + 1)] = min(dp[i * lo + (j + 1)] + 1,
+                    min(dp[(i + 1) * lo + j] + 1, dp[i * lo + j] + cost));
+            if (i > 0 && j > 0 && ci == toBaseLowerCase(output[j - 1])
+                    && co == toBaseLowerCase(input[i - 1])) {
+                dp[(i + 1) * lo + (j + 1)] = min(
+                        dp[(i + 1) * lo + (j + 1)], dp[(i - 1) * lo + (j - 1)] + cost);
+            }
+        }
+    }
+
+    if (DEBUG_EDIT_DISTANCE) {
+        LOGI("IN = %d, OUT = %d", inputLength, outputLength);
+        for (int i = 0; i < li; ++i) {
+            for (int j = 0; j < lo; ++j) {
+                LOGI("EDIT[%d][%d], %d", i, j, dp[i * lo + j]);
+            }
+        }
+    }
+    return dp[li * lo - 1];
+}
+#endif
+
 } // namespace latinime
diff --git a/native/src/correction.h b/native/src/correction.h
index d4e99f0..e55be8d 100644
--- a/native/src/correction.h
+++ b/native/src/correction.h
@@ -44,7 +44,8 @@
 
     // TODO: remove
     void setCorrectionParams(const int skipPos, const int excessivePos, const int transposedPos,
-            const int spaceProximityPos, const int missingSpacePos, const bool useFullEditDistance);
+            const int spaceProximityPos, const int missingSpacePos, const bool useFullEditDistance,
+            const bool doAutoCompletion, const int maxErrors);
     void checkState();
     bool initProcessState(const int index);
 
@@ -109,6 +110,7 @@
     const ProximityInfo *mProximityInfo;
 
     bool mUseFullEditDistance;
+    bool mDoAutoCompletion;
     int mMaxEditDistance;
     int mMaxDepth;
     int mInputLength;
@@ -116,6 +118,7 @@
     int mMissingSpacePos;
     int mTerminalInputIndex;
     int mTerminalOutputIndex;
+    int mMaxErrors;
 
     // The following arrays are state buffer.
     unsigned short mWord[MAX_WORD_LENGTH_INTERNAL];
diff --git a/native/src/defines.h b/native/src/defines.h
index ea643bf..e1d2ca3 100644
--- a/native/src/defines.h
+++ b/native/src/defines.h
@@ -202,6 +202,10 @@
 // This is only used for the size of array. Not to be used in c functions.
 #define MAX_WORD_LENGTH_INTERNAL 48
 
+// Word limit for sub queues used in WordsPriorityQueuePool.  Sub queues are temporary queues used
+// for better performance.
+#define SUB_QUEUE_MAX_WORDS 5
+
 #define MAX_DEPTH_MULTIPLIER 3
 
 // TODO: Reduce this constant if possible; check the maximum number of umlauts in the same German
diff --git a/native/src/dictionary.cpp b/native/src/dictionary.cpp
index 55358ec..e3673d4 100644
--- a/native/src/dictionary.cpp
+++ b/native/src/dictionary.cpp
@@ -39,7 +39,8 @@
         }
     }
     mCorrection = new Correction(typedLetterMultiplier, fullWordMultiplier);
-    mWordsPriorityQueue = new WordsPriorityQueue(maxWords, maxWordLength);
+    mWordsPriorityQueuePool = new WordsPriorityQueuePool(
+            maxWords, SUB_QUEUE_MAX_WORDS, maxWordLength);
     mUnigramDictionary = new UnigramDictionary(mDict, typedLetterMultiplier, fullWordMultiplier,
             maxWordLength, maxWords, maxAlternatives, IS_LATEST_DICT_VERSION);
     mBigramDictionary = new BigramDictionary(mDict, maxWordLength, maxAlternatives,
@@ -48,7 +49,7 @@
 
 Dictionary::~Dictionary() {
     delete mCorrection;
-    delete mWordsPriorityQueue;
+    delete mWordsPriorityQueuePool;
     delete mUnigramDictionary;
     delete mBigramDictionary;
 }
diff --git a/native/src/dictionary.h b/native/src/dictionary.h
index 2a6e4e0..52048ec 100644
--- a/native/src/dictionary.h
+++ b/native/src/dictionary.h
@@ -23,7 +23,7 @@
 #include "defines.h"
 #include "proximity_info.h"
 #include "unigram_dictionary.h"
-#include "words_priority_queue.h"
+#include "words_priority_queue_pool.h"
 
 namespace latinime {
 
@@ -34,7 +34,7 @@
 
     int getSuggestions(ProximityInfo *proximityInfo, int *xcoordinates, int *ycoordinates,
             int *codes, int codesSize, int flags, unsigned short *outWords, int *frequencies) {
-        return mUnigramDictionary->getSuggestions(proximityInfo, mWordsPriorityQueue,
+        return mUnigramDictionary->getSuggestions(proximityInfo, mWordsPriorityQueuePool,
                 mCorrection, xcoordinates, ycoordinates, codes,
                 codesSize, flags, outWords, frequencies);
     }
@@ -81,7 +81,7 @@
     const bool IS_LATEST_DICT_VERSION;
     UnigramDictionary *mUnigramDictionary;
     BigramDictionary *mBigramDictionary;
-    WordsPriorityQueue *mWordsPriorityQueue;
+    WordsPriorityQueuePool *mWordsPriorityQueuePool;
     Correction *mCorrection;
 };
 
diff --git a/native/src/unigram_dictionary.cpp b/native/src/unigram_dictionary.cpp
index a2c1f72..0db33e7 100644
--- a/native/src/unigram_dictionary.cpp
+++ b/native/src/unigram_dictionary.cpp
@@ -93,7 +93,7 @@
         const int *xcoordinates, const int *ycoordinates, const int *codesBuffer,
         const int codesBufferSize, const int flags, const int *codesSrc,
         const int codesRemain, const int currentDepth, int *codesDest, Correction *correction,
-        WordsPriorityQueue *queue) {
+        WordsPriorityQueuePool *queuePool) {
 
     if (currentDepth < MAX_UMLAUT_SEARCH_DEPTH) {
         for (int i = 0; i < codesRemain; ++i) {
@@ -110,7 +110,8 @@
                 getWordWithDigraphSuggestionsRec(proximityInfo, xcoordinates, ycoordinates,
                         codesBuffer, codesBufferSize, flags,
                         codesSrc + (i + 1) * MAX_PROXIMITY_CHARS, codesRemain - i - 1,
-                        currentDepth + 1, codesDest + i * MAX_PROXIMITY_CHARS, correction, queue);
+                        currentDepth + 1, codesDest + i * MAX_PROXIMITY_CHARS, correction,
+                        queuePool);
 
                 // Copy the second char of the digraph in place, then continue processing on
                 // the remaining part of the word.
@@ -120,7 +121,7 @@
                 getWordWithDigraphSuggestionsRec(proximityInfo, xcoordinates, ycoordinates,
                         codesBuffer, codesBufferSize, flags,
                         codesSrc + i * MAX_PROXIMITY_CHARS, codesRemain - i, currentDepth + 1,
-                        codesDest + i * MAX_PROXIMITY_CHARS, correction, queue);
+                        codesDest + i * MAX_PROXIMITY_CHARS, correction, queuePool);
                 return;
             }
         }
@@ -137,27 +138,28 @@
 
     getWordSuggestions(proximityInfo, xcoordinates, ycoordinates, codesBuffer,
             (codesDest - codesBuffer) / MAX_PROXIMITY_CHARS + codesRemain, flags, correction,
-            queue);
+            queuePool);
 }
 
-int UnigramDictionary::getSuggestions(ProximityInfo *proximityInfo, WordsPriorityQueue *queue,
-        Correction *correction, const int *xcoordinates, const int *ycoordinates, const int *codes,
-        const int codesSize, const int flags, unsigned short *outWords, int *frequencies) {
+int UnigramDictionary::getSuggestions(ProximityInfo *proximityInfo,
+        WordsPriorityQueuePool *queuePool, Correction *correction, const int *xcoordinates,
+        const int *ycoordinates, const int *codes, const int codesSize, const int flags,
+        unsigned short *outWords, int *frequencies) {
 
-    WordsPriorityQueue* masterQueue = queue;
     Correction* masterCorrection = correction;
     if (REQUIRES_GERMAN_UMLAUT_PROCESSING & flags)
     { // Incrementally tune the word and try all possibilities
         int codesBuffer[getCodesBufferSize(codes, codesSize, MAX_PROXIMITY_CHARS)];
         getWordWithDigraphSuggestionsRec(proximityInfo, xcoordinates, ycoordinates, codesBuffer,
-                codesSize, flags, codes, codesSize, 0, codesBuffer, masterCorrection, masterQueue);
+                codesSize, flags, codes, codesSize, 0, codesBuffer, masterCorrection, queuePool);
     } else { // Normal processing
         getWordSuggestions(proximityInfo, xcoordinates, ycoordinates, codes, codesSize, flags,
-                masterCorrection, masterQueue);
+                masterCorrection, queuePool);
     }
 
     PROF_START(20);
-    const int suggestedWordsCount = masterQueue->outputSuggestions(frequencies, outWords);
+    const int suggestedWordsCount =
+            queuePool->getMasterQueue()->outputSuggestions(frequencies, outWords);
 
     if (DEBUG_DICT) {
         LOGI("Returning %d words", suggestedWordsCount);
@@ -178,11 +180,13 @@
 
 void UnigramDictionary::getWordSuggestions(ProximityInfo *proximityInfo,
         const int *xcoordinates, const int *ycoordinates, const int *codes,
-        const int inputLength, const int flags, Correction *correction, WordsPriorityQueue *queue) {
+        const int inputLength, const int flags, Correction *correction,
+        WordsPriorityQueuePool *queuePool) {
+    WordsPriorityQueue *masterQueue = queuePool->getMasterQueue();
 
     PROF_OPEN;
     PROF_START(0);
-    initSuggestions(proximityInfo, xcoordinates, ycoordinates, codes, inputLength, queue);
+    initSuggestions(proximityInfo, xcoordinates, ycoordinates, codes, inputLength, masterQueue);
     if (DEBUG_DICT) assert(codesSize == inputLength);
 
     const int maxDepth = min(inputLength * MAX_DEPTH_MULTIPLIER, MAX_WORD_LENGTH);
@@ -192,7 +196,7 @@
     const bool useFullEditDistance = USE_FULL_EDIT_DISTANCE & flags;
     // TODO: remove
     PROF_START(1);
-    getSuggestionCandidates(useFullEditDistance, inputLength, correction, queue);
+    getSuggestionCandidates(useFullEditDistance, inputLength, correction, masterQueue);
     PROF_END(1);
 
     PROF_START(2);
@@ -216,7 +220,7 @@
                 LOGI("--- Suggest missing space characters %d", i);
             }
             getMissingSpaceWords(
-                    inputLength, i, proximityInfo, correction, useFullEditDistance, queue);
+                    inputLength, i, proximityInfo, correction, useFullEditDistance, queuePool);
         }
     }
     PROF_END(5);
@@ -235,8 +239,8 @@
                         i, x, y, proximityInfo->hasSpaceProximity(x, y));
             }
             if (proximityInfo->hasSpaceProximity(x, y)) {
-                getMistypedSpaceWords(
-                        inputLength, i, proximityInfo, correction, useFullEditDistance, queue);
+                getMistypedSpaceWords(inputLength, i, proximityInfo, correction,
+                        useFullEditDistance, queuePool);
             }
         }
     }
@@ -260,7 +264,8 @@
         const int inputLength, Correction *correction, WordsPriorityQueue *queue) {
     // TODO: Remove setCorrectionParams
     correction->setCorrectionParams(0, 0, 0,
-            -1 /* spaceProximityPos */, -1 /* missingSpacePos */, useFullEditDistance);
+            -1 /* spaceProximityPos */, -1 /* missingSpacePos */, useFullEditDistance,
+            true /* doAutoCompletion */, DEFAULT_MAX_ERRORS);
     int rootPosition = ROOT_POS;
     // Get the number of children of root, then increment the position
     int childCount = Dictionary::getCount(DICT_ROOT, &rootPosition);
@@ -292,20 +297,20 @@
 
 void UnigramDictionary::getMissingSpaceWords(
         const int inputLength, const int missingSpacePos, ProximityInfo *proximityInfo,
-        Correction *correction, const bool useFullEditDistance, WordsPriorityQueue *queue) {
+        Correction *correction, const bool useFullEditDistance, WordsPriorityQueuePool *queuePool) {
     correction->setCorrectionParams(-1 /* skipPos */, -1 /* excessivePos */,
             -1 /* transposedPos */, -1 /* spaceProximityPos */, missingSpacePos,
-            useFullEditDistance);
-    getSplitTwoWordsSuggestion(inputLength, proximityInfo, correction, queue);
+            useFullEditDistance, false /* doAutoCompletion */, MAX_ERRORS_FOR_TWO_WORDS);
+    getSplitTwoWordsSuggestion(inputLength, proximityInfo, correction, queuePool);
 }
 
 void UnigramDictionary::getMistypedSpaceWords(
         const int inputLength, const int spaceProximityPos, ProximityInfo *proximityInfo,
-        Correction *correction, const bool useFullEditDistance, WordsPriorityQueue *queue) {
+        Correction *correction, const bool useFullEditDistance, WordsPriorityQueuePool *queuePool) {
     correction->setCorrectionParams(-1 /* skipPos */, -1 /* excessivePos */,
             -1 /* transposedPos */, spaceProximityPos, -1 /* missingSpacePos */,
-            useFullEditDistance);
-    getSplitTwoWordsSuggestion(inputLength, proximityInfo, correction, queue);
+            useFullEditDistance, false /* doAutoCompletion */, MAX_ERRORS_FOR_TWO_WORDS);
+    getSplitTwoWordsSuggestion(inputLength, proximityInfo, correction, queuePool);
 }
 
 inline void UnigramDictionary::onTerminal(
@@ -320,7 +325,9 @@
 
 void UnigramDictionary::getSplitTwoWordsSuggestion(
         const int inputLength, ProximityInfo *proximityInfo, Correction *correction,
-        WordsPriorityQueue *queue) {
+        WordsPriorityQueuePool *queuePool) {
+    WordsPriorityQueue *masterQueue = queuePool->getMasterQueue();
+
     const int spaceProximityPos = correction->getSpaceProximityPos();
     const int missingSpacePos = correction->getMissingSpacePos();
     if (DEBUG_DICT) {
@@ -372,7 +379,7 @@
     if (DEBUG_DICT) {
         LOGI("Split two words:  %d, %d, %d, %d", firstFreq, secondFreq, pairFreq, inputLength);
     }
-    addWord(word, newWordLength, pairFreq, queue);
+    addWord(word, newWordLength, pairFreq, masterQueue);
     return;
 }
 
@@ -585,7 +592,7 @@
         if (stateType == Correction::TRAVERSE_ALL_ON_TERMINAL
                 || stateType == Correction::ON_TERMINAL) {
             needsToInvokeOnTerminal = true;
-        } else if (stateType == Correction::UNRELATED) {
+        } else if (stateType == Correction::UNRELATED || correction->needsToPrune()) {
             // We found that this is an unrelated character, so we should give up traversing
             // this node and its children entirely.
             // However we may not be on the last virtual node yet so we skip the remaining
diff --git a/native/src/unigram_dictionary.h b/native/src/unigram_dictionary.h
index 0b01265..ce15cdd 100644
--- a/native/src/unigram_dictionary.h
+++ b/native/src/unigram_dictionary.h
@@ -23,6 +23,7 @@
 #include "defines.h"
 #include "proximity_info.h"
 #include "words_priority_queue.h"
+#include "words_priority_queue_pool.h"
 
 namespace latinime {
 
@@ -61,12 +62,16 @@
     static const int FLAG_ATTRIBUTE_ADDRESS_TYPE_TWOBYTES = 0x20;
     static const int FLAG_ATTRIBUTE_ADDRESS_TYPE_THREEBYTES = 0x30;
 
+    // Error tolerances
+    static const int DEFAULT_MAX_ERRORS = 2;
+    static const int MAX_ERRORS_FOR_TWO_WORDS = 1;
+
     UnigramDictionary(const uint8_t* const streamStart, int typedLetterMultipler,
             int fullWordMultiplier, int maxWordLength, int maxWords, int maxProximityChars,
             const bool isLatestDictVersion);
     bool isValidWord(const uint16_t* const inWord, const int length) const;
     int getBigramPosition(int pos, unsigned short *word, int offset, int length) const;
-    int getSuggestions(ProximityInfo *proximityInfo, WordsPriorityQueue *queue,
+    int getSuggestions(ProximityInfo *proximityInfo, WordsPriorityQueuePool *queuePool,
             Correction *correction, const int *xcoordinates,
             const int *ycoordinates, const int *codes, const int codesSize, const int flags,
             unsigned short *outWords, int *frequencies);
@@ -76,13 +81,13 @@
 
     void getWordSuggestions(ProximityInfo *proximityInfo, const int *xcoordinates,
             const int *ycoordinates, const int *codes, const int inputLength,
-            const int flags, Correction *correction, WordsPriorityQueue *queue);
+            const int flags, Correction *correction, WordsPriorityQueuePool *queuePool);
     bool isDigraph(const int *codes, const int i, const int codesSize) const;
     void getWordWithDigraphSuggestionsRec(ProximityInfo *proximityInfo,
         const int *xcoordinates, const int* ycoordinates, const int *codesBuffer,
         const int codesBufferSize, const int flags, const int* codesSrc,
         const int codesRemain, const int currentDepth, int* codesDest, Correction *correction,
-        WordsPriorityQueue* queue);
+        WordsPriorityQueuePool* queuePool);
     void initSuggestions(ProximityInfo *proximityInfo, const int *xcoordinates,
             const int *ycoordinates, const int *codes, const int codesSize,
             WordsPriorityQueue *queue);
@@ -90,13 +95,13 @@
             const bool useFullEditDistance, const int inputLength, Correction *correction,
             WordsPriorityQueue* queue);
     void getSplitTwoWordsSuggestion(const int inputLength, ProximityInfo *proximityInfo,
-            Correction *correction, WordsPriorityQueue *queue);
+            Correction *correction, WordsPriorityQueuePool *queuePool);
     void getMissingSpaceWords(const int inputLength, const int missingSpacePos,
             ProximityInfo *proximityInfo, Correction *correction,
-            const bool useFullEditDistance, WordsPriorityQueue *queue);
+            const bool useFullEditDistance, WordsPriorityQueuePool *queuePool);
     void getMistypedSpaceWords(const int inputLength, const int spaceProximityPos,
             ProximityInfo *proximityInfo, Correction *correction,
-            const bool useFullEditDistance, WordsPriorityQueue *queue);
+            const bool useFullEditDistance, WordsPriorityQueuePool *queuePool);
     void onTerminal(const int freq, Correction *correction, WordsPriorityQueue *queue);
     bool needsToSkipCurrentNode(const unsigned short c,
             const int inputIndex, const int skipPos, const int depth);
diff --git a/native/src/words_priority_queue.h b/native/src/words_priority_queue.h
index 366b1b6..a4175d3 100644
--- a/native/src/words_priority_queue.h
+++ b/native/src/words_priority_queue.h
@@ -24,7 +24,7 @@
 namespace latinime {
 
 class WordsPriorityQueue {
-private:
+public:
     class SuggestedWord {
     public:
         int mScore;
@@ -40,31 +40,6 @@
         }
     };
 
-    struct wordComparator {
-        bool operator ()(SuggestedWord * left, SuggestedWord * right) {
-            return left->mScore > right->mScore;
-        }
-    };
-
-    SuggestedWord* getFreeSuggestedWord(int score, unsigned short* word,
-            int wordLength) {
-        for (unsigned int i = 0; i < MAX_WORD_LENGTH; ++i) {
-            if (!mSuggestedWords[i].mUsed) {
-                mSuggestedWords[i].setParams(score, word, wordLength);
-                return &mSuggestedWords[i];
-            }
-        }
-        return 0;
-    }
-
-    typedef std::priority_queue<SuggestedWord*, std::vector<SuggestedWord*>,
-            wordComparator> Suggestions;
-    Suggestions mSuggestions;
-    const unsigned int MAX_WORDS;
-    const unsigned int MAX_WORD_LENGTH;
-    SuggestedWord* mSuggestedWords;
-
-public:
     WordsPriorityQueue(int maxWords, int maxWordLength) :
             MAX_WORDS((unsigned int) maxWords), MAX_WORD_LENGTH(
                     (unsigned int) maxWordLength) {
@@ -105,6 +80,13 @@
         mSuggestions.push(sw);
     }
 
+    SuggestedWord* topAndPop() {
+        if (mSuggestions.empty()) return 0;
+        SuggestedWord* sw = mSuggestions.top();
+        mSuggestions.pop();
+        return sw;
+    }
+
     int outputSuggestions(int *frequencies, unsigned short *outputChars) {
         const unsigned int size = min(MAX_WORDS, mSuggestions.size());
         int index = size - 1;
@@ -140,6 +122,30 @@
             mSuggestions.pop();
         }
     }
+private:
+    struct wordComparator {
+        bool operator ()(SuggestedWord * left, SuggestedWord * right) {
+            return left->mScore > right->mScore;
+        }
+    };
+
+    SuggestedWord* getFreeSuggestedWord(int score, unsigned short* word,
+            int wordLength) {
+        for (unsigned int i = 0; i < MAX_WORD_LENGTH; ++i) {
+            if (!mSuggestedWords[i].mUsed) {
+                mSuggestedWords[i].setParams(score, word, wordLength);
+                return &mSuggestedWords[i];
+            }
+        }
+        return 0;
+    }
+
+    typedef std::priority_queue<SuggestedWord*, std::vector<SuggestedWord*>,
+            wordComparator> Suggestions;
+    Suggestions mSuggestions;
+    const unsigned int MAX_WORDS;
+    const unsigned int MAX_WORD_LENGTH;
+    SuggestedWord* mSuggestedWords;
 };
 }
 
diff --git a/native/src/words_priority_queue_pool.h b/native/src/words_priority_queue_pool.h
new file mode 100644
index 0000000..d964bfc
--- /dev/null
+++ b/native/src/words_priority_queue_pool.h
@@ -0,0 +1,53 @@
+/*
+ * Copyright (C) 2011 The Android Open Source Project
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *      http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef LATINIME_WORDS_PRIORITY_QUEUE_POOL_H
+#define LATINIME_WORDS_PRIORITY_QUEUE_POOL_H
+
+#include "words_priority_queue.h"
+
+namespace latinime {
+
+class WordsPriorityQueuePool {
+public:
+    WordsPriorityQueuePool(int mainQueueMaxWords, int subQueueMaxWords, int maxWordLength) {
+        mMasterQueue = new WordsPriorityQueue(mainQueueMaxWords, maxWordLength);
+        mSubQueue1 = new WordsPriorityQueue(subQueueMaxWords, maxWordLength);
+        mSubQueue2 = new WordsPriorityQueue(subQueueMaxWords, maxWordLength);
+    }
+
+    ~WordsPriorityQueuePool() {
+        delete mMasterQueue;
+    }
+
+    WordsPriorityQueue* getMasterQueue() {
+        return mMasterQueue;
+    }
+    // TODO: Come up with more generic pool
+    WordsPriorityQueue* getSubQueue1() {
+        return mSubQueue1;
+    }
+    WordsPriorityQueue* getSubQueue2() {
+        return mSubQueue2;
+    }
+private:
+    WordsPriorityQueue *mMasterQueue;
+    WordsPriorityQueue *mSubQueue1;
+    WordsPriorityQueue *mSubQueue2;
+};
+}
+
+#endif // LATINIME_WORDS_PRIORITY_QUEUE_POOL_H