diff --git a/java/src/com/android/inputmethod/latin/utils/StringUtils.java b/common/src/com/android/inputmethod/latin/common/StringUtils.java
similarity index 99%
rename from java/src/com/android/inputmethod/latin/utils/StringUtils.java
rename to common/src/com/android/inputmethod/latin/common/StringUtils.java
index 7aecc9d..bbe4664 100644
--- a/java/src/com/android/inputmethod/latin/utils/StringUtils.java
+++ b/common/src/com/android/inputmethod/latin/common/StringUtils.java
@@ -14,10 +14,9 @@
  * limitations under the License.
  */
 
-package com.android.inputmethod.latin.utils;
+package com.android.inputmethod.latin.common;
 
 import com.android.inputmethod.annotations.UsedForTesting;
-import com.android.inputmethod.latin.common.Constants;
 
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/java/src/com/android/inputmethod/accessibility/KeyCodeDescriptionMapper.java b/java/src/com/android/inputmethod/accessibility/KeyCodeDescriptionMapper.java
index 9f7caa4..bbda9f8 100644
--- a/java/src/com/android/inputmethod/accessibility/KeyCodeDescriptionMapper.java
+++ b/java/src/com/android/inputmethod/accessibility/KeyCodeDescriptionMapper.java
@@ -28,7 +28,7 @@
 import com.android.inputmethod.keyboard.KeyboardId;
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.utils.StringUtils;
+import com.android.inputmethod.latin.common.StringUtils;
 
 import java.util.Locale;
 
diff --git a/java/src/com/android/inputmethod/event/Event.java b/java/src/com/android/inputmethod/event/Event.java
index 92bcda4..a1226dc 100644
--- a/java/src/com/android/inputmethod/event/Event.java
+++ b/java/src/com/android/inputmethod/event/Event.java
@@ -19,7 +19,7 @@
 import com.android.inputmethod.annotations.ExternallyReferenced;
 import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.utils.StringUtils;
+import com.android.inputmethod.latin.common.StringUtils;
 
 import javax.annotation.Nonnull;
 
diff --git a/java/src/com/android/inputmethod/keyboard/Key.java b/java/src/com/android/inputmethod/keyboard/Key.java
index 04a0f1e..6b2094b 100644
--- a/java/src/com/android/inputmethod/keyboard/Key.java
+++ b/java/src/com/android/inputmethod/keyboard/Key.java
@@ -38,7 +38,7 @@
 import com.android.inputmethod.keyboard.internal.MoreKeySpec;
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.utils.StringUtils;
+import com.android.inputmethod.latin.common.StringUtils;
 
 import java.util.Arrays;
 import java.util.Locale;
diff --git a/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java b/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
index e66523b..f3aaaef 100644
--- a/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
@@ -56,9 +56,9 @@
 import com.android.inputmethod.latin.RichInputMethodSubtype;
 import com.android.inputmethod.latin.SuggestedWords;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.settings.DebugSettings;
 import com.android.inputmethod.latin.utils.CoordinateUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 import com.android.inputmethod.latin.utils.TypefaceUtils;
 
 import java.util.Locale;
diff --git a/java/src/com/android/inputmethod/keyboard/MoreKeysKeyboard.java b/java/src/com/android/inputmethod/keyboard/MoreKeysKeyboard.java
index abcfff8..f0de86f 100644
--- a/java/src/com/android/inputmethod/keyboard/MoreKeysKeyboard.java
+++ b/java/src/com/android/inputmethod/keyboard/MoreKeysKeyboard.java
@@ -24,7 +24,7 @@
 import com.android.inputmethod.keyboard.internal.KeyboardParams;
 import com.android.inputmethod.keyboard.internal.MoreKeySpec;
 import com.android.inputmethod.latin.R;
-import com.android.inputmethod.latin.utils.StringUtils;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.utils.TypefaceUtils;
 
 public final class MoreKeysKeyboard extends Keyboard {
diff --git a/java/src/com/android/inputmethod/keyboard/internal/CodesArrayParser.java b/java/src/com/android/inputmethod/keyboard/internal/CodesArrayParser.java
index 5797b7e..2e2ed52 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/CodesArrayParser.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/CodesArrayParser.java
@@ -17,7 +17,7 @@
 package com.android.inputmethod.keyboard.internal;
 
 import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.utils.StringUtils;
+import com.android.inputmethod.latin.common.StringUtils;
 
 import android.text.TextUtils;
 
diff --git a/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java b/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java
index d33e53a..63aab96 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/KeySpecParser.java
@@ -20,7 +20,7 @@
 import static com.android.inputmethod.latin.common.Constants.CODE_UNSPECIFIED;
 
 import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.utils.StringUtils;
+import com.android.inputmethod.latin.common.StringUtils;
 
 /**
  * The string parser of the key specification.
diff --git a/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java b/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java
index 6c75fb6..c739bf3 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/KeyboardBuilder.java
@@ -34,8 +34,8 @@
 import com.android.inputmethod.keyboard.KeyboardTheme;
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.utils.ResourceUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
 import com.android.inputmethod.latin.utils.XmlParseUtils;
 import com.android.inputmethod.latin.utils.XmlParseUtils.ParseException;
diff --git a/java/src/com/android/inputmethod/keyboard/internal/MoreKeySpec.java b/java/src/com/android/inputmethod/keyboard/internal/MoreKeySpec.java
index 4392dbc..a0bb406 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/MoreKeySpec.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/MoreKeySpec.java
@@ -22,9 +22,9 @@
 import com.android.inputmethod.compat.CharacterCompat;
 import com.android.inputmethod.keyboard.Key;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.define.DebugFlags;
 import com.android.inputmethod.latin.utils.CollectionUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/java/src/com/android/inputmethod/latin/BinaryDictionary.java b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
index 76459f8..1c4ff96 100644
--- a/java/src/com/android/inputmethod/latin/BinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/BinaryDictionary.java
@@ -24,6 +24,7 @@
 import com.android.inputmethod.keyboard.ProximityInfo;
 import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.makedict.DictionaryHeader;
 import com.android.inputmethod.latin.makedict.FormatSpec;
 import com.android.inputmethod.latin.makedict.FormatSpec.DictionaryOptions;
@@ -33,7 +34,6 @@
 import com.android.inputmethod.latin.utils.BinaryDictionaryUtils;
 import com.android.inputmethod.latin.utils.FileUtils;
 import com.android.inputmethod.latin.utils.JniUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 import com.android.inputmethod.latin.utils.WordInputEventForPersonalization;
 
 import java.io.File;
diff --git a/java/src/com/android/inputmethod/latin/ContactsBinaryDictionary.java b/java/src/com/android/inputmethod/latin/ContactsBinaryDictionary.java
index 08e1983..59763c0 100644
--- a/java/src/com/android/inputmethod/latin/ContactsBinaryDictionary.java
+++ b/java/src/com/android/inputmethod/latin/ContactsBinaryDictionary.java
@@ -30,9 +30,9 @@
 
 import com.android.inputmethod.annotations.ExternallyReferenced;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.personalization.AccountUtils;
 import com.android.inputmethod.latin.utils.ExecutorUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 
 import java.io.File;
 import java.util.ArrayList;
diff --git a/java/src/com/android/inputmethod/latin/InputAttributes.java b/java/src/com/android/inputmethod/latin/InputAttributes.java
index 0022220..37effee 100644
--- a/java/src/com/android/inputmethod/latin/InputAttributes.java
+++ b/java/src/com/android/inputmethod/latin/InputAttributes.java
@@ -24,8 +24,8 @@
 import android.util.Log;
 import android.view.inputmethod.EditorInfo;
 
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.utils.InputTypeUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/java/src/com/android/inputmethod/latin/NgramContext.java b/java/src/com/android/inputmethod/latin/NgramContext.java
index 0ccea47..82a1327 100644
--- a/java/src/com/android/inputmethod/latin/NgramContext.java
+++ b/java/src/com/android/inputmethod/latin/NgramContext.java
@@ -20,7 +20,7 @@
 
 import com.android.inputmethod.annotations.UsedForTesting;
 import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.utils.StringUtils;
+import com.android.inputmethod.latin.common.StringUtils;
 
 import java.util.Arrays;
 
diff --git a/java/src/com/android/inputmethod/latin/PunctuationSuggestions.java b/java/src/com/android/inputmethod/latin/PunctuationSuggestions.java
index 93598d2..a65304c 100644
--- a/java/src/com/android/inputmethod/latin/PunctuationSuggestions.java
+++ b/java/src/com/android/inputmethod/latin/PunctuationSuggestions.java
@@ -18,7 +18,7 @@
 
 import com.android.inputmethod.keyboard.internal.KeySpecParser;
 import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.utils.StringUtils;
+import com.android.inputmethod.latin.common.StringUtils;
 
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/java/src/com/android/inputmethod/latin/RichInputConnection.java b/java/src/com/android/inputmethod/latin/RichInputConnection.java
index 0763ef8..834f747 100644
--- a/java/src/com/android/inputmethod/latin/RichInputConnection.java
+++ b/java/src/com/android/inputmethod/latin/RichInputConnection.java
@@ -35,6 +35,7 @@
 
 import com.android.inputmethod.compat.InputConnectionCompatUtils;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.inputlogic.PrivateCommandPerformer;
 import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
 import com.android.inputmethod.latin.utils.CapsModeUtils;
@@ -42,7 +43,6 @@
 import com.android.inputmethod.latin.utils.NgramContextUtils;
 import com.android.inputmethod.latin.utils.ScriptUtils;
 import com.android.inputmethod.latin.utils.SpannableStringUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 import com.android.inputmethod.latin.utils.TextRange;
 
 import javax.annotation.Nonnull;
diff --git a/java/src/com/android/inputmethod/latin/Suggest.java b/java/src/com/android/inputmethod/latin/Suggest.java
index 17df1ea..bb7d243 100644
--- a/java/src/com/android/inputmethod/latin/Suggest.java
+++ b/java/src/com/android/inputmethod/latin/Suggest.java
@@ -21,11 +21,11 @@
 import com.android.inputmethod.keyboard.ProximityInfo;
 import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.define.DebugFlags;
 import com.android.inputmethod.latin.settings.SettingsValuesForSuggestion;
 import com.android.inputmethod.latin.utils.AutoCorrectionUtils;
 import com.android.inputmethod.latin.utils.BinaryDictionaryUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 import com.android.inputmethod.latin.utils.SuggestionResults;
 
 import java.util.ArrayList;
diff --git a/java/src/com/android/inputmethod/latin/SuggestedWords.java b/java/src/com/android/inputmethod/latin/SuggestedWords.java
index a642889..b84de69 100644
--- a/java/src/com/android/inputmethod/latin/SuggestedWords.java
+++ b/java/src/com/android/inputmethod/latin/SuggestedWords.java
@@ -21,8 +21,8 @@
 
 import com.android.inputmethod.annotations.UsedForTesting;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.define.DebugFlags;
-import com.android.inputmethod.latin.utils.StringUtils;
 
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/java/src/com/android/inputmethod/latin/WordComposer.java b/java/src/com/android/inputmethod/latin/WordComposer.java
index 8830521..35436f5 100644
--- a/java/src/com/android/inputmethod/latin/WordComposer.java
+++ b/java/src/com/android/inputmethod/latin/WordComposer.java
@@ -20,9 +20,9 @@
 import com.android.inputmethod.event.Event;
 import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.define.DebugFlags;
 import com.android.inputmethod.latin.utils.CoordinateUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 
 import java.util.ArrayList;
 import java.util.Collections;
diff --git a/java/src/com/android/inputmethod/latin/inputlogic/InputLogic.java b/java/src/com/android/inputmethod/latin/inputlogic/InputLogic.java
index a67f461..f3a2873 100644
--- a/java/src/com/android/inputmethod/latin/inputlogic/InputLogic.java
+++ b/java/src/com/android/inputmethod/latin/inputlogic/InputLogic.java
@@ -52,6 +52,7 @@
 import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 import com.android.inputmethod.latin.WordComposer;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.define.DebugFlags;
 import com.android.inputmethod.latin.settings.SettingsValues;
 import com.android.inputmethod.latin.settings.SettingsValuesForSuggestion;
@@ -61,7 +62,6 @@
 import com.android.inputmethod.latin.utils.InputTypeUtils;
 import com.android.inputmethod.latin.utils.RecapitalizeStatus;
 import com.android.inputmethod.latin.utils.StatsUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 import com.android.inputmethod.latin.utils.TextRange;
 
 import java.util.ArrayList;
diff --git a/java/src/com/android/inputmethod/latin/makedict/WordProperty.java b/java/src/com/android/inputmethod/latin/makedict/WordProperty.java
index e7808e4..388d578 100644
--- a/java/src/com/android/inputmethod/latin/makedict/WordProperty.java
+++ b/java/src/com/android/inputmethod/latin/makedict/WordProperty.java
@@ -21,8 +21,8 @@
 import com.android.inputmethod.latin.Dictionary;
 import com.android.inputmethod.latin.NgramContext;
 import com.android.inputmethod.latin.NgramContext.WordInfo;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.utils.CombinedFormatUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/java/src/com/android/inputmethod/latin/settings/Settings.java b/java/src/com/android/inputmethod/latin/settings/Settings.java
index 6d23fcb..19db606 100644
--- a/java/src/com/android/inputmethod/latin/settings/Settings.java
+++ b/java/src/com/android/inputmethod/latin/settings/Settings.java
@@ -29,11 +29,11 @@
 import com.android.inputmethod.latin.AudioAndHapticFeedbackManager;
 import com.android.inputmethod.latin.InputAttributes;
 import com.android.inputmethod.latin.R;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.utils.AdditionalSubtypeUtils;
 import com.android.inputmethod.latin.utils.ResourceUtils;
 import com.android.inputmethod.latin.utils.RunInLocale;
 import com.android.inputmethod.latin.utils.StatsUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 
 import java.util.Collections;
 import java.util.Locale;
diff --git a/java/src/com/android/inputmethod/latin/settings/SpacingAndPunctuations.java b/java/src/com/android/inputmethod/latin/settings/SpacingAndPunctuations.java
index 46aef89..70d97a5 100644
--- a/java/src/com/android/inputmethod/latin/settings/SpacingAndPunctuations.java
+++ b/java/src/com/android/inputmethod/latin/settings/SpacingAndPunctuations.java
@@ -23,7 +23,7 @@
 import com.android.inputmethod.latin.PunctuationSuggestions;
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.utils.StringUtils;
+import com.android.inputmethod.latin.common.StringUtils;
 
 import java.util.Arrays;
 import java.util.Locale;
diff --git a/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java b/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
index 514bfca..3ad8fb9 100644
--- a/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
+++ b/java/src/com/android/inputmethod/latin/spellcheck/AndroidWordLevelSpellCheckerSession.java
@@ -34,11 +34,11 @@
 import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 import com.android.inputmethod.latin.WordComposer;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.utils.BinaryDictionaryUtils;
 import com.android.inputmethod.latin.utils.CoordinateUtils;
 import com.android.inputmethod.latin.utils.LocaleUtils;
 import com.android.inputmethod.latin.utils.ScriptUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 import com.android.inputmethod.latin.utils.SuggestionResults;
 
 import java.util.ArrayList;
diff --git a/java/src/com/android/inputmethod/latin/utils/AdditionalSubtypeUtils.java b/java/src/com/android/inputmethod/latin/utils/AdditionalSubtypeUtils.java
index 02ace6a..2aac7c5 100644
--- a/java/src/com/android/inputmethod/latin/utils/AdditionalSubtypeUtils.java
+++ b/java/src/com/android/inputmethod/latin/utils/AdditionalSubtypeUtils.java
@@ -31,6 +31,7 @@
 import com.android.inputmethod.annotations.UsedForTesting;
 import com.android.inputmethod.compat.InputMethodSubtypeCompatUtils;
 import com.android.inputmethod.latin.R;
+import com.android.inputmethod.latin.common.StringUtils;
 
 import java.util.ArrayList;
 import java.util.Arrays;
diff --git a/java/src/com/android/inputmethod/latin/utils/BinaryDictionaryUtils.java b/java/src/com/android/inputmethod/latin/utils/BinaryDictionaryUtils.java
index ce25fe6..23ffde2 100644
--- a/java/src/com/android/inputmethod/latin/utils/BinaryDictionaryUtils.java
+++ b/java/src/com/android/inputmethod/latin/utils/BinaryDictionaryUtils.java
@@ -18,6 +18,7 @@
 
 import com.android.inputmethod.annotations.UsedForTesting;
 import com.android.inputmethod.latin.BinaryDictionary;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.makedict.DictionaryHeader;
 import com.android.inputmethod.latin.makedict.UnsupportedFormatException;
 import com.android.inputmethod.latin.personalization.PersonalizationHelper;
diff --git a/java/src/com/android/inputmethod/latin/utils/CapsModeUtils.java b/java/src/com/android/inputmethod/latin/utils/CapsModeUtils.java
index b087e9e..0db63fd 100644
--- a/java/src/com/android/inputmethod/latin/utils/CapsModeUtils.java
+++ b/java/src/com/android/inputmethod/latin/utils/CapsModeUtils.java
@@ -21,6 +21,7 @@
 
 import com.android.inputmethod.latin.WordComposer;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
 
 import java.util.Locale;
diff --git a/java/src/com/android/inputmethod/latin/utils/DistracterFilterCheckingExactMatchesAndSuggestions.java b/java/src/com/android/inputmethod/latin/utils/DistracterFilterCheckingExactMatchesAndSuggestions.java
index 8f0f9bb..56c8249 100644
--- a/java/src/com/android/inputmethod/latin/utils/DistracterFilterCheckingExactMatchesAndSuggestions.java
+++ b/java/src/com/android/inputmethod/latin/utils/DistracterFilterCheckingExactMatchesAndSuggestions.java
@@ -40,6 +40,7 @@
 import com.android.inputmethod.latin.RichInputMethodSubtype;
 import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 import com.android.inputmethod.latin.WordComposer;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.settings.SettingsValuesForSuggestion;
 
 /**
diff --git a/java/src/com/android/inputmethod/latin/utils/RecapitalizeStatus.java b/java/src/com/android/inputmethod/latin/utils/RecapitalizeStatus.java
index e3cac97..21daddc 100644
--- a/java/src/com/android/inputmethod/latin/utils/RecapitalizeStatus.java
+++ b/java/src/com/android/inputmethod/latin/utils/RecapitalizeStatus.java
@@ -16,6 +16,8 @@
 
 package com.android.inputmethod.latin.utils;
 
+import com.android.inputmethod.latin.common.StringUtils;
+
 import java.util.Locale;
 
 /**
diff --git a/java/src/com/android/inputmethod/latin/utils/SubtypeLocaleUtils.java b/java/src/com/android/inputmethod/latin/utils/SubtypeLocaleUtils.java
index 3e6680b..55c1dc9 100644
--- a/java/src/com/android/inputmethod/latin/utils/SubtypeLocaleUtils.java
+++ b/java/src/com/android/inputmethod/latin/utils/SubtypeLocaleUtils.java
@@ -28,6 +28,7 @@
 
 import com.android.inputmethod.latin.R;
 import com.android.inputmethod.latin.RichInputMethodSubtype;
+import com.android.inputmethod.latin.common.StringUtils;
 
 import java.util.Arrays;
 import java.util.HashMap;
diff --git a/java/src/com/android/inputmethod/latin/utils/WordInputEventForPersonalization.java b/java/src/com/android/inputmethod/latin/utils/WordInputEventForPersonalization.java
index d3fa0c7..86a5b19 100644
--- a/java/src/com/android/inputmethod/latin/utils/WordInputEventForPersonalization.java
+++ b/java/src/com/android/inputmethod/latin/utils/WordInputEventForPersonalization.java
@@ -21,6 +21,7 @@
 import com.android.inputmethod.annotations.UsedForTesting;
 import com.android.inputmethod.latin.NgramContext;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
 import com.android.inputmethod.latin.utils.DistracterFilter.HandlingType;
 
diff --git a/tests/src/com/android/inputmethod/keyboard/layout/expected/ActualKeyboardBuilder.java b/tests/src/com/android/inputmethod/keyboard/layout/expected/ActualKeyboardBuilder.java
index a6aac35..afc5448 100644
--- a/tests/src/com/android/inputmethod/keyboard/layout/expected/ActualKeyboardBuilder.java
+++ b/tests/src/com/android/inputmethod/keyboard/layout/expected/ActualKeyboardBuilder.java
@@ -20,7 +20,7 @@
 import com.android.inputmethod.keyboard.internal.KeyboardIconsSet;
 import com.android.inputmethod.keyboard.internal.MoreKeySpec;
 import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.utils.StringUtils;
+import com.android.inputmethod.latin.common.StringUtils;
 
 import java.util.ArrayList;
 import java.util.List;
diff --git a/tests/src/com/android/inputmethod/keyboard/layout/expected/ExpectedKeyOutput.java b/tests/src/com/android/inputmethod/keyboard/layout/expected/ExpectedKeyOutput.java
index 0547ea3..9bb5f18 100644
--- a/tests/src/com/android/inputmethod/keyboard/layout/expected/ExpectedKeyOutput.java
+++ b/tests/src/com/android/inputmethod/keyboard/layout/expected/ExpectedKeyOutput.java
@@ -19,7 +19,7 @@
 import com.android.inputmethod.keyboard.Key;
 import com.android.inputmethod.keyboard.internal.MoreKeySpec;
 import com.android.inputmethod.latin.common.Constants;
-import com.android.inputmethod.latin.utils.StringUtils;
+import com.android.inputmethod.latin.common.StringUtils;
 
 import java.util.Locale;
 
diff --git a/tests/src/com/android/inputmethod/latin/InputTestsBase.java b/tests/src/com/android/inputmethod/latin/InputTestsBase.java
index 78b4b18..161336a 100644
--- a/tests/src/com/android/inputmethod/latin/InputTestsBase.java
+++ b/tests/src/com/android/inputmethod/latin/InputTestsBase.java
@@ -43,10 +43,10 @@
 import com.android.inputmethod.latin.Dictionary.PhonyDictionary;
 import com.android.inputmethod.latin.SuggestedWords.SuggestedWordInfo;
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.settings.DebugSettings;
 import com.android.inputmethod.latin.settings.Settings;
 import com.android.inputmethod.latin.utils.LocaleUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 import com.android.inputmethod.latin.utils.SubtypeLocaleUtils;
 
 import java.util.Locale;
diff --git a/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java b/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java
index 34c2600..bcf016a 100644
--- a/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java
+++ b/tests/src/com/android/inputmethod/latin/RichInputConnectionAndTextRangeTests.java
@@ -31,11 +31,11 @@
 import android.view.inputmethod.InputConnectionWrapper;
 
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.settings.SpacingAndPunctuations;
 import com.android.inputmethod.latin.utils.NgramContextUtils;
 import com.android.inputmethod.latin.utils.RunInLocale;
 import com.android.inputmethod.latin.utils.ScriptUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 import com.android.inputmethod.latin.utils.TextRange;
 
 import java.util.Locale;
diff --git a/tests/src/com/android/inputmethod/latin/WordComposerTests.java b/tests/src/com/android/inputmethod/latin/WordComposerTests.java
index 8f5e8f7..20256e6 100644
--- a/tests/src/com/android/inputmethod/latin/WordComposerTests.java
+++ b/tests/src/com/android/inputmethod/latin/WordComposerTests.java
@@ -20,8 +20,8 @@
 import android.test.suitebuilder.annotation.SmallTest;
 
 import com.android.inputmethod.latin.common.Constants;
+import com.android.inputmethod.latin.common.StringUtils;
 import com.android.inputmethod.latin.utils.CoordinateUtils;
-import com.android.inputmethod.latin.utils.StringUtils;
 
 /**
  * Unit tests for WordComposer.
diff --git a/tools/dicttool/Android.mk b/tools/dicttool/Android.mk
index 09af9a0..90be411 100644
--- a/tools/dicttool/Android.mk
+++ b/tools/dicttool/Android.mk
@@ -60,8 +60,7 @@
         latin/utils/FileUtils.java \
         latin/utils/JniUtils.java \
         latin/utils/LocaleUtils.java \
-        latin/utils/ResizableIntArray.java \
-        latin/utils/StringUtils.java
+        latin/utils/ResizableIntArray.java
 
 LATINIME_OVERRIDABLE_SRC_FILES_FOR_DICTTOOL := \
         latin/define/DebugFlags.java