diff --git a/java/src/com/android/inputmethod/keyboard/KeyboardView.java b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
index 350dc69..43d28be 100644
--- a/java/src/com/android/inputmethod/keyboard/KeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/KeyboardView.java
@@ -287,10 +287,10 @@
             }
         }
 
-        // ResearchLogging indicator.
+        // Research Logging (Development Only Diagnostics) indicator.
         // TODO: Reimplement using a keyboard background image specific to the ResearchLogger,
         // and remove this call.
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.getInstance().paintIndicator(this, paint, canvas, width, height);
         }
 
diff --git a/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java b/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
index d37b69b..f0ca9c1 100644
--- a/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
+++ b/java/src/com/android/inputmethod/keyboard/MainKeyboardView.java
@@ -662,7 +662,7 @@
                 ? mSpaceKey.getIcon(keyboard.mIconsSet, Constants.Color.ALPHA_OPAQUE) : null;
         final int keyHeight = keyboard.mMostCommonKeyHeight - keyboard.mVerticalGap;
         mSpacebarTextSize = keyHeight * mSpacebarTextRatio;
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.mainKeyboardView_setKeyboard(keyboard);
         }
 
@@ -925,10 +925,10 @@
     @Override
     protected void onAttachedToWindow() {
         super.onAttachedToWindow();
-        // Notify the research logger that the keyboard view has been attached.  This is needed
-        // to properly show the splash screen, which requires that the window token of the
-        // KeyboardView be non-null.
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        // Notify the ResearchLogger (development only diagnostics) that the keyboard view has
+        // been attached.  This is needed to properly show the splash screen, which requires that
+        // the window token of the KeyboardView be non-null.
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.getInstance().mainKeyboardView_onAttachedToWindow(this);
         }
     }
@@ -937,9 +937,10 @@
     protected void onDetachedFromWindow() {
         super.onDetachedFromWindow();
         mPreviewPlacerView.removeAllViews();
-        // Notify the research logger that the keyboard view has been detached.  This is needed
-        // to invalidate the reference of {@link MainKeyboardView} to null.
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        // Notify the ResearchLogger (development only diagnostics) that the keyboard view has
+        // been detached.  This is needed to invalidate the reference of {@link MainKeyboardView}
+        // to null.
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.getInstance().mainKeyboardView_onDetachedFromWindow();
         }
     }
@@ -977,7 +978,7 @@
         if (key == null) {
             return false;
         }
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.mainKeyboardView_onLongPress();
         }
         final int code = key.mCode;
@@ -1125,7 +1126,7 @@
         }
         // TODO: This should be moved to the tracker.processMotionEvent() call below.
         // Currently the same "move" event is being logged twice.
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.mainKeyboardView_processMotionEvent(
                     me, action, eventTime, index, id, x, y);
         }
@@ -1185,7 +1186,7 @@
                 if (ENABLE_USABILITY_STUDY_LOG) {
                     writeUsabilityStudyLog(me, action, eventTime, i, pointerId, px, py);
                 }
-                if (ProductionFlag.IS_EXPERIMENTAL) {
+                if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                     ResearchLogger.mainKeyboardView_processMotionEvent(
                             me, action, eventTime, i, pointerId, px, py);
                 }
diff --git a/java/src/com/android/inputmethod/keyboard/PointerTracker.java b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
index d54b98c..dcfae73 100644
--- a/java/src/com/android/inputmethod/keyboard/PointerTracker.java
+++ b/java/src/com/android/inputmethod/keyboard/PointerTracker.java
@@ -478,7 +478,7 @@
                     output, ignoreModifierKey ? " ignoreModifier" : "",
                     altersCode ? " altersCode" : "", key.isEnabled() ? "" : " disabled"));
         }
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.pointerTracker_callListenerOnCodeInput(key, x, y, ignoreModifierKey,
                     altersCode, code);
         }
@@ -510,7 +510,7 @@
                     withSliding ? " sliding" : "", ignoreModifierKey ? " ignoreModifier" : "",
                     key.isEnabled() ?  "": " disabled"));
         }
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.pointerTracker_callListenerOnRelease(key, primaryCode, withSliding,
                     ignoreModifierKey);
         }
@@ -526,7 +526,7 @@
         if (DEBUG_LISTENER) {
             Log.d(TAG, String.format("[%d] onCancelInput", mPointerId));
         }
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.pointerTracker_callListenerOnCancelInput();
         }
         mListener.onCancelInput();
@@ -843,7 +843,7 @@
                     Log.w(TAG, String.format("[%d] onDownEvent:"
                             + " ignore potential noise: time=%d distance=%d",
                             mPointerId, deltaT, distance));
-                if (ProductionFlag.IS_EXPERIMENTAL) {
+                if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                     ResearchLogger.pointerTracker_onDownEvent(deltaT, distance * distance);
                 }
                 cancelTracking();
@@ -1000,7 +1000,7 @@
                     x, y, Constants.printableCode(key.mCode)));
         }
         // TODO: This should be moved to outside of this nested if-clause?
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.pointerTracker_onMoveEvent(x, y, lastX, lastY);
         }
         onUpEventInternal(x, y, eventTime);
diff --git a/java/src/com/android/inputmethod/keyboard/internal/TouchScreenRegulator.java b/java/src/com/android/inputmethod/keyboard/internal/TouchScreenRegulator.java
index ac83ff8..d6b1cc6 100644
--- a/java/src/com/android/inputmethod/keyboard/internal/TouchScreenRegulator.java
+++ b/java/src/com/android/inputmethod/keyboard/internal/TouchScreenRegulator.java
@@ -145,7 +145,7 @@
         if (handleSuddenJumping(me)) {
             if (DEBUG_MODE)
                 Log.w(TAG, "onTouchEvent: ignore sudden jump " + me);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.suddenJumpingTouchEventHandler_onTouchEvent(me);
             }
             return true;
diff --git a/java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java b/java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java
index 94598c8..f68e9f9 100644
--- a/java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java
+++ b/java/src/com/android/inputmethod/latin/BinaryDictionaryGetter.java
@@ -289,8 +289,9 @@
         // cacheWordListsFromContentProvider returns the list of files it copied to local
         // storage, but we don't really care about what was copied NOW: what we want is the
         // list of everything we ever cached, so we ignore the return value.
-        // TODO: The experimental version is not supported by the Dictionary Pack Service yet
-        if (!ProductionFlag.IS_EXPERIMENTAL) {
+        // TODO: The development-only-diagnostic version is not supported by the Dictionary Pack
+        // Service yet
+        if (!ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             // We need internet access to do the following. Only do this if the package actually
             // has the permission.
             if (context.checkCallingOrSelfPermission(android.Manifest.permission.INTERNET)
diff --git a/java/src/com/android/inputmethod/latin/LatinIME.java b/java/src/com/android/inputmethod/latin/LatinIME.java
index e7c64c6..8d4dd3c 100644
--- a/java/src/com/android/inputmethod/latin/LatinIME.java
+++ b/java/src/com/android/inputmethod/latin/LatinIME.java
@@ -173,9 +173,10 @@
     private int mDisplayOrientation;
 
     // Object for reacting to adding/removing a dictionary pack.
-    // TODO: The experimental version is not supported by the Dictionary Pack Service yet.
+    // TODO: The development-only-diagnostic version is not supported by the Dictionary Pack
+    // Service yet.
     private BroadcastReceiver mDictionaryPackInstallReceiver =
-            ProductionFlag.IS_EXPERIMENTAL
+            ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS
                     ? null : new DictionaryPackInstallBroadcastReceiver(this);
 
     // Keeps track of most recently inserted text (multi-character key) for reverting
@@ -427,7 +428,7 @@
         loadSettings();
         initSuggest();
 
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.getInstance().init(this, mKeyboardSwitcher, mSuggest);
         }
         mDisplayOrientation = getResources().getConfiguration().orientation;
@@ -439,8 +440,9 @@
         filter.addAction(AudioManager.RINGER_MODE_CHANGED_ACTION);
         registerReceiver(mReceiver, filter);
 
-        // TODO: The experimental version is not supported by the Dictionary Pack Service yet.
-        if (!ProductionFlag.IS_EXPERIMENTAL) {
+        // TODO: The development-only-diagnostic version is not supported by the Dictionary Pack
+        // Service yet.
+        if (!ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             final IntentFilter packageFilter = new IntentFilter();
             packageFilter.addAction(Intent.ACTION_PACKAGE_ADDED);
             packageFilter.addAction(Intent.ACTION_PACKAGE_REMOVED);
@@ -492,7 +494,7 @@
         }
 
         mIsMainDictionaryAvailable = DictionaryFactory.isDictionaryAvailable(this, subtypeLocale);
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.getInstance().initSuggest(mSuggest);
         }
 
@@ -563,11 +565,12 @@
         }
         mSettings.onDestroy();
         unregisterReceiver(mReceiver);
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.getInstance().onDestroy();
         }
-        // TODO: The experimental version is not supported by the Dictionary Pack Service yet.
-        if (!ProductionFlag.IS_EXPERIMENTAL) {
+        // TODO: The development-only-diagnostic version is not supported by the Dictionary Pack
+        // Service yet.
+        if (!ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             unregisterReceiver(mDictionaryPackInstallReceiver);
         }
         LatinImeLogger.commit();
@@ -675,7 +678,7 @@
                     + ", word caps = "
                     + ((editorInfo.inputType & InputType.TYPE_TEXT_FLAG_CAP_WORDS) != 0));
         }
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             final SharedPreferences prefs = PreferenceManager.getDefaultSharedPreferences(this);
             ResearchLogger.latinIME_onStartInputViewInternal(editorInfo, prefs);
         }
@@ -800,7 +803,7 @@
 
     @Override
     public void onWindowHidden() {
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.latinIME_onWindowHidden(mLastSelectionStart, mLastSelectionEnd,
                     getCurrentInputConnection());
         }
@@ -831,7 +834,7 @@
         // Remove pending messages related to update suggestions
         mHandler.cancelUpdateSuggestionStrip();
         resetComposingState(true /* alsoResetLastComposedWord */);
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.getInstance().latinIME_onFinishInputViewInternal();
         }
     }
@@ -852,7 +855,7 @@
                     + ", cs=" + composingSpanStart
                     + ", ce=" + composingSpanEnd);
         }
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             final boolean expectingUpdateSelectionFromLogger =
                     ResearchLogger.getAndClearLatinIMEExpectingUpdateSelection();
             ResearchLogger.latinIME_onUpdateSelection(mLastSelectionStart, mLastSelectionEnd,
@@ -984,7 +987,7 @@
         mApplicationSpecifiedCompletions = applicationSpecifiedCompletions;
         if (applicationSpecifiedCompletions == null) {
             clearSuggestionStrip();
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.latinIME_onDisplayCompletions(null);
             }
             return;
@@ -1005,7 +1008,7 @@
         setSuggestedWords(suggestedWords, isAutoCorrection);
         setAutoCorrectionIndicator(isAutoCorrection);
         setSuggestionStripShown(true);
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.latinIME_onDisplayCompletions(applicationSpecifiedCompletions);
         }
     }
@@ -1144,7 +1147,7 @@
         if (typedWord.length() > 0) {
             commitChosenWord(typedWord, LastComposedWord.COMMIT_TYPE_USER_TYPED_WORD,
                     separatorString);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.getInstance().onWordFinished(typedWord, mWordComposer.isBatchMode());
             }
         }
@@ -1184,7 +1187,7 @@
             mConnection.deleteSurroundingText(2, 0);
             final String text = lastTwo.charAt(1) + " ";
             mConnection.commitText(text, 1);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.latinIME_swapSwapperAndSpace(lastTwo, text);
             }
             mKeyboardSwitcher.updateShiftState();
@@ -1204,7 +1207,7 @@
             mConnection.deleteSurroundingText(2, 0);
             final String textToInsert = ". ";
             mConnection.commitText(textToInsert, 1);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.latinIME_maybeDoubleSpacePeriod(textToInsert,
                         false /* isBatchMode */);
             }
@@ -1319,7 +1322,7 @@
     }
 
     private void sendKeyCodePoint(final int code) {
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.latinIME_sendKeyCodePoint(code);
         }
         // TODO: Remove this special handling of digit letters.
@@ -1345,7 +1348,7 @@
     // Implementation of {@link KeyboardActionListener}.
     @Override
     public void onCodeInput(final int primaryCode, final int x, final int y) {
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.latinIME_onCodeInput(primaryCode, x, y);
         }
         final long when = SystemClock.uptimeMillis();
@@ -1397,7 +1400,7 @@
             handleLanguageSwitchKey();
             break;
         case Constants.CODE_RESEARCH:
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.getInstance().onResearchKeySelected(this);
             }
             break;
@@ -1489,7 +1492,7 @@
             promotePhantomSpace();
         }
         mConnection.commitText(text, 1);
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.latinIME_onTextInput(text, false /* isBatchMode */);
         }
         mConnection.endBatchEdit();
@@ -1670,7 +1673,7 @@
         mConnection.setComposingText(batchInputText, 1);
         mExpectingUpdateSelection = true;
         mConnection.endBatchEdit();
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.latinIME_onEndBatchInput(batchInputText, 0, suggestedWords);
         }
         // Space state must be updated before calling updateShiftState
@@ -1719,7 +1722,7 @@
             final int length = mWordComposer.size();
             if (length > 0) {
                 if (mWordComposer.isBatchMode()) {
-                    if (ProductionFlag.IS_EXPERIMENTAL) {
+                    if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                         final String word = mWordComposer.getTypedWord();
                         ResearchLogger.latinIME_handleBackspace_batch(word, 1);
                         ResearchLogger.getInstance().uncommitCurrentLogUnit(
@@ -1780,7 +1783,7 @@
                 // later (typically, in a subsequent press on backspace).
                 mLastSelectionEnd = mLastSelectionStart;
                 mConnection.deleteSurroundingText(numCharsDeleted, 0);
-                if (ProductionFlag.IS_EXPERIMENTAL) {
+                if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                     ResearchLogger.latinIME_handleBackspace(numCharsDeleted);
                 }
             } else {
@@ -1799,12 +1802,12 @@
                 } else {
                     mConnection.deleteSurroundingText(1, 0);
                 }
-                if (ProductionFlag.IS_EXPERIMENTAL) {
+                if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                     ResearchLogger.latinIME_handleBackspace(1);
                 }
                 if (mDeleteCount > DELETE_ACCELERATE_AT) {
                     mConnection.deleteSurroundingText(1, 0);
-                    if (ProductionFlag.IS_EXPERIMENTAL) {
+                    if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                         ResearchLogger.latinIME_handleBackspace(1);
                     }
                 }
@@ -1903,7 +1906,7 @@
     // Returns true if we did an autocorrection, false otherwise.
     private boolean handleSeparator(final int primaryCode, final int x, final int y,
             final int spaceState) {
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.recordTimeForLogUnitSplit();
             ResearchLogger.latinIME_handleSeparator(primaryCode, mWordComposer.isComposingWord());
         }
@@ -2148,7 +2151,7 @@
             if (mSettings.isInternal()) {
                 Stats.onAutoCorrection(typedWord, autoCorrection, separatorString, mWordComposer);
             }
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 final SuggestedWords suggestedWords = mSuggestedWords;
                 ResearchLogger.latinIme_commitCurrentAutoCorrection(typedWord, autoCorrection,
                         separatorString, mWordComposer.isBatchMode(), suggestedWords);
@@ -2184,7 +2187,7 @@
             final int primaryCode = suggestion.charAt(0);
             onCodeInput(primaryCode,
                     Constants.SUGGESTION_STRIP_COORDINATE, Constants.SUGGESTION_STRIP_COORDINATE);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.latinIME_punctuationSuggestion(index, suggestion,
                         false /* isBatchMode */, suggestedWords.mIsPrediction);
             }
@@ -2225,7 +2228,7 @@
         mExpectingUpdateSelection = true;
         commitChosenWord(suggestion, LastComposedWord.COMMIT_TYPE_MANUAL_PICK,
                 LastComposedWord.NOT_A_SEPARATOR);
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.latinIME_pickSuggestionManually(replacedWord, index, suggestion,
                     mWordComposer.isBatchMode());
         }
@@ -2326,7 +2329,7 @@
             restartSuggestionsOnWordBeforeCursor(word);
             // TODO: Handle the case where the user manually moves the cursor and then backs up over
             // a separator.  In that case, the current log unit should not be uncommitted.
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.getInstance().uncommitCurrentLogUnit(word.toString(),
                         true /* dumpCurrentLogUnit */);
             }
@@ -2372,7 +2375,7 @@
             Stats.onSeparator(mLastComposedWord.mSeparatorString,
                     Constants.NOT_A_COORDINATE, Constants.NOT_A_COORDINATE);
         }
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.latinIME_revertCommit(committedWord, originallyTypedWord,
                     mWordComposer.isBatchMode(), mLastComposedWord.mSeparatorString);
             ResearchLogger.getInstance().uncommitCurrentLogUnit(committedWord,
@@ -2389,7 +2392,7 @@
     public void promotePhantomSpace() {
         if (mSettings.getCurrent().shouldInsertSpacesAutomatically()) {
             sendKeyCodePoint(Constants.CODE_SPACE);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.latinIME_promotePhantomSpace();
             }
         }
diff --git a/java/src/com/android/inputmethod/latin/RichInputConnection.java b/java/src/com/android/inputmethod/latin/RichInputConnection.java
index 7300dbd..8a7ade4 100644
--- a/java/src/com/android/inputmethod/latin/RichInputConnection.java
+++ b/java/src/com/android/inputmethod/latin/RichInputConnection.java
@@ -142,7 +142,7 @@
         if (null != textBeforeCursor) mCommittedTextBeforeComposingText.append(textBeforeCursor);
         if (null != mIC) {
             mIC.finishComposingText();
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.richInputConnection_finishComposingText();
             }
         }
@@ -164,7 +164,7 @@
         mComposingText.setLength(0);
         if (null != mIC) {
             mIC.finishComposingText();
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.richInputConnection_finishComposingText();
             }
         }
@@ -263,7 +263,7 @@
         }
         if (null != mIC) {
             mIC.deleteSurroundingText(i, j);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.richInputConnection_deleteSurroundingText(i, j);
             }
         }
@@ -274,7 +274,7 @@
         mIC = mParent.getCurrentInputConnection();
         if (null != mIC) {
             mIC.performEditorAction(actionId);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.richInputConnection_performEditorAction(actionId);
             }
         }
@@ -322,7 +322,7 @@
         }
         if (null != mIC) {
             mIC.sendKeyEvent(keyEvent);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.richInputConnection_sendKeyEvent(keyEvent);
             }
         }
@@ -355,7 +355,7 @@
         // TODO: support values of i != 1. At this time, this is never called with i != 1.
         if (null != mIC) {
             mIC.setComposingText(text, i);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.richInputConnection_setComposingText(text, i);
             }
         }
@@ -367,7 +367,7 @@
         if (DEBUG_PREVIOUS_TEXT) checkConsistencyForDebug();
         if (null != mIC) {
             mIC.setSelection(from, to);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.richInputConnection_setSelection(from, to);
             }
         }
@@ -396,7 +396,7 @@
         mComposingText.setLength(0);
         if (null != mIC) {
             mIC.commitCompletion(completionInfo);
-            if (ProductionFlag.IS_EXPERIMENTAL) {
+            if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
                 ResearchLogger.richInputConnection_commitCompletion(completionInfo);
             }
         }
@@ -657,7 +657,7 @@
         deleteSurroundingText(2, 0);
         final String doubleSpace = "  ";
         commitText(doubleSpace, 1);
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.richInputConnection_revertDoubleSpacePeriod();
         }
         return true;
@@ -682,7 +682,7 @@
         deleteSurroundingText(2, 0);
         final String text = " " + textBeforeCursor.subSequence(0, 1);
         commitText(text, 1);
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.richInputConnection_revertSwapPunctuation();
         }
         return true;
diff --git a/java/src/com/android/inputmethod/latin/SettingsFragment.java b/java/src/com/android/inputmethod/latin/SettingsFragment.java
index cc9f168..840829c 100644
--- a/java/src/com/android/inputmethod/latin/SettingsFragment.java
+++ b/java/src/com/android/inputmethod/latin/SettingsFragment.java
@@ -147,8 +147,9 @@
                 (PreferenceScreen) findPreference(Settings.PREF_CONFIGURE_DICTIONARIES_KEY);
         final Intent intent = dictionaryLink.getIntent();
         final int number = context.getPackageManager().queryIntentActivities(intent, 0).size();
-        // TODO: The experimental version is not supported by the Dictionary Pack Service yet
-        if (ProductionFlag.IS_EXPERIMENTAL || 0 >= number) {
+        // TODO: The development-only-diagnostic version is not supported by the Dictionary Pack
+        // Service yet
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS || 0 >= number) {
             textCorrectionGroup.removePreference(dictionaryLink);
         }
 
diff --git a/java/src/com/android/inputmethod/latin/define/ProductionFlag.java b/java/src/com/android/inputmethod/latin/define/ProductionFlag.java
index 3df0d04..699e47b 100644
--- a/java/src/com/android/inputmethod/latin/define/ProductionFlag.java
+++ b/java/src/com/android/inputmethod/latin/define/ProductionFlag.java
@@ -21,12 +21,12 @@
         // This class is not publicly instantiable.
     }
 
-    public static final boolean IS_EXPERIMENTAL = false;
+    public static final boolean USES_DEVELOPMENT_ONLY_DIAGNOSTICS = false;
 
-    // When false, IS_EXPERIMENTAL_DEBUG suggests that all guarded class-private DEBUG flags should
-    // be false, and any privacy controls should be enforced.  IS_EXPERIMENTAL_DEBUG should be false
-    // for any released build.
-    public static final boolean IS_EXPERIMENTAL_DEBUG = false;
+    // When false, USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG suggests that all guarded
+    // class-private DEBUG flags should be false, and any privacy controls should be enforced.
+    // USES_DEVELOPMENT_ONLY_DIAGNOSTICS must be false for any production build.
+    public static final boolean USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG = false;
 
     public static final boolean IS_HARDWARE_KEYBOARD_SUPPORTED = true;
 }
diff --git a/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java b/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java
index 5a29eee..8c3d3b0 100644
--- a/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java
+++ b/java/src/com/android/inputmethod/latin/suggestions/SuggestionStripView.java
@@ -617,7 +617,7 @@
         clear();
         mSuggestedWords = suggestedWords;
         mParams.layout(mSuggestedWords, mSuggestionsStrip, this, getWidth());
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             ResearchLogger.suggestionStripView_setSuggestions(mSuggestedWords);
         }
     }
diff --git a/java/src/com/android/inputmethod/research/LogStatement.java b/java/src/com/android/inputmethod/research/LogStatement.java
index 09b12fc..06b918a 100644
--- a/java/src/com/android/inputmethod/research/LogStatement.java
+++ b/java/src/com/android/inputmethod/research/LogStatement.java
@@ -37,7 +37,8 @@
  */
 public class LogStatement {
     private static final String TAG = LogStatement.class.getSimpleName();
-    private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    private static final boolean DEBUG = false
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
 
     // Constants for particular statements
     public static final String TYPE_POINTER_TRACKER_CALL_LISTENER_ON_CODE_INPUT =
diff --git a/java/src/com/android/inputmethod/research/LogUnit.java b/java/src/com/android/inputmethod/research/LogUnit.java
index 61b6df0..1c01675 100644
--- a/java/src/com/android/inputmethod/research/LogUnit.java
+++ b/java/src/com/android/inputmethod/research/LogUnit.java
@@ -46,7 +46,8 @@
  */
 public class LogUnit {
     private static final String TAG = LogUnit.class.getSimpleName();
-    private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    private static final boolean DEBUG = false
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
 
     private final ArrayList<LogStatement> mLogStatementList;
     private final ArrayList<Object[]> mValuesList;
diff --git a/java/src/com/android/inputmethod/research/MainLogBuffer.java b/java/src/com/android/inputmethod/research/MainLogBuffer.java
index 9aa60f8..3303d2b 100644
--- a/java/src/com/android/inputmethod/research/MainLogBuffer.java
+++ b/java/src/com/android/inputmethod/research/MainLogBuffer.java
@@ -60,7 +60,8 @@
  */
 public abstract class MainLogBuffer extends FixedLogBuffer {
     private static final String TAG = MainLogBuffer.class.getSimpleName();
-    private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    private static final boolean DEBUG = false
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
 
     // The size of the n-grams logged.  E.g. N_GRAM_SIZE = 2 means to sample bigrams.
     public static final int N_GRAM_SIZE = 2;
diff --git a/java/src/com/android/inputmethod/research/MotionEventReader.java b/java/src/com/android/inputmethod/research/MotionEventReader.java
index e59adfa..e1cc2da 100644
--- a/java/src/com/android/inputmethod/research/MotionEventReader.java
+++ b/java/src/com/android/inputmethod/research/MotionEventReader.java
@@ -34,7 +34,8 @@
 
 public class MotionEventReader {
     private static final String TAG = MotionEventReader.class.getSimpleName();
-    private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    private static final boolean DEBUG = false
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
     // Assumes that MotionEvent.ACTION_MASK does not have all bits set.`
     private static final int UNINITIALIZED_ACTION = ~MotionEvent.ACTION_MASK;
     // No legitimate int is negative
diff --git a/java/src/com/android/inputmethod/research/Replayer.java b/java/src/com/android/inputmethod/research/Replayer.java
index a9b7a9d..903875f 100644
--- a/java/src/com/android/inputmethod/research/Replayer.java
+++ b/java/src/com/android/inputmethod/research/Replayer.java
@@ -37,7 +37,8 @@
  */
 public class Replayer {
     private static final String TAG = Replayer.class.getSimpleName();
-    private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    private static final boolean DEBUG = false
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
     private static final long START_TIME_DELAY_MS = 500;
 
     private boolean mIsReplaying = false;
diff --git a/java/src/com/android/inputmethod/research/ResearchLog.java b/java/src/com/android/inputmethod/research/ResearchLog.java
index 080366e..35a491f 100644
--- a/java/src/com/android/inputmethod/research/ResearchLog.java
+++ b/java/src/com/android/inputmethod/research/ResearchLog.java
@@ -47,12 +47,14 @@
  * tries to avoid creating unnecessary files if there is nothing to write.  It also handles
  * flushing, making sure it happens, but not too frequently.
  *
- * This functionality is off by default. See {@link ProductionFlag#IS_EXPERIMENTAL}.
+ * This functionality is off by default. See
+ * {@link ProductionFlag#USES_DEVELOPMENT_ONLY_DIAGNOSTICS}.
  */
 public class ResearchLog {
     // TODO: Automatically initialize the JsonWriter rather than requiring the caller to manage it.
     private static final String TAG = ResearchLog.class.getSimpleName();
-    private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    private static final boolean DEBUG = false
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
     private static final long FLUSH_DELAY_IN_MS = 1000 * 5;
 
     /* package */ final ScheduledExecutorService mExecutor;
diff --git a/java/src/com/android/inputmethod/research/ResearchLogger.java b/java/src/com/android/inputmethod/research/ResearchLogger.java
index e932a2d..a38a226 100644
--- a/java/src/com/android/inputmethod/research/ResearchLogger.java
+++ b/java/src/com/android/inputmethod/research/ResearchLogger.java
@@ -97,7 +97,8 @@
  * This class logs operations on the IME keyboard, including what the user has typed.
  * Data is stored locally in a file in app-specific storage.
  *
- * This functionality is off by default. See {@link ProductionFlag#IS_EXPERIMENTAL}.
+ * This functionality is off by default. See
+ * {@link ProductionFlag#USES_DEVELOPMENT_ONLY_DIAGNOSTICS}.
  */
 public class ResearchLogger implements SharedPreferences.OnSharedPreferenceChangeListener {
     // TODO: This class has grown quite large and combines several concerns that should be
@@ -109,13 +110,14 @@
     // TODO: Refactor.  Move logging invocations into their own class.
     // TODO: Refactor.  Move currentLogUnit management into separate class.
     private static final String TAG = ResearchLogger.class.getSimpleName();
-    private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    private static final boolean DEBUG = false
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
     private static final boolean DEBUG_REPLAY_AFTER_FEEDBACK = false
-            && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
     // Whether the TextView contents are logged at the end of the session.  true will disclose
     // private info.
     private static final boolean LOG_FULL_TEXTVIEW_CONTENTS = false
-            && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
     // Whether the feedback dialog preserves the editable text across invocations.  Should be false
     // for normal research builds so users do not have to delete the same feedback string they
     // entered earlier.  Should be true for builds internal to a development team so when the text
@@ -128,7 +130,7 @@
     // Whether all words should be recorded, leaving unsampled word between bigrams.  Useful for
     // testing.
     /* package for test */ static final boolean IS_LOGGING_EVERYTHING = false
-            && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
     // The number of words between n-grams to omit from the log.
     private static final int NUMBER_OF_WORDS_BETWEEN_SAMPLES =
             IS_LOGGING_EVERYTHING ? 0 : (DEBUG ? 2 : 18);
@@ -139,7 +141,7 @@
     // Change the default indicator to something very visible.  Currently two red vertical bars on
     // either side of they keyboard.
     private static final boolean IS_SHOWING_INDICATOR_CLEARLY = false ||
-            (IS_LOGGING_EVERYTHING && ProductionFlag.IS_EXPERIMENTAL_DEBUG);
+            (IS_LOGGING_EVERYTHING && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG);
     // FEEDBACK_WORD_BUFFER_SIZE should add 1 because it must also hold the feedback LogUnit itself.
     public static final int FEEDBACK_WORD_BUFFER_SIZE = (Integer.MAX_VALUE - 1) + 1;
 
@@ -251,7 +253,7 @@
         mUploadIntent = new Intent(mLatinIME, UploaderService.class);
         mUploadNowIntent = new Intent(mLatinIME, UploaderService.class);
         mUploadNowIntent.putExtra(UploaderService.EXTRA_UPLOAD_UNCONDITIONALLY, true);
-        if (ProductionFlag.IS_EXPERIMENTAL) {
+        if (ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS) {
             scheduleUploadingService(mLatinIME);
         }
         mReplayer.setKeyboardSwitcher(keyboardSwitcher);
@@ -1091,7 +1093,7 @@
             new LogStatement("LatinImeOnStartInputViewInternal", false, false, "uuid",
                     "packageName", "inputType", "imeOptions", "fieldId", "display", "model",
                     "prefs", "versionCode", "versionName", "outputFormatVersion", "logEverything",
-                    "isExperimentalDebug");
+                    "isUsingDevelopmentOnlyDiagnosticsDebug");
     public static void latinIME_onStartInputViewInternal(final EditorInfo editorInfo,
             final SharedPreferences prefs) {
         final ResearchLogger researchLogger = getInstance();
@@ -1113,7 +1115,7 @@
                         Integer.toHexString(editorInfo.imeOptions), editorInfo.fieldId,
                         Build.DISPLAY, Build.MODEL, prefs, versionCode, versionName,
                         OUTPUT_FORMAT_VERSION, IS_LOGGING_EVERYTHING,
-                        ProductionFlag.IS_EXPERIMENTAL_DEBUG);
+                        ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG);
             } catch (NameNotFoundException e) {
                 e.printStackTrace();
             }
diff --git a/java/src/com/android/inputmethod/research/Statistics.java b/java/src/com/android/inputmethod/research/Statistics.java
index 50e2b7f..7f6c851 100644
--- a/java/src/com/android/inputmethod/research/Statistics.java
+++ b/java/src/com/android/inputmethod/research/Statistics.java
@@ -23,7 +23,8 @@
 
 public class Statistics {
     private static final String TAG = Statistics.class.getSimpleName();
-    private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    private static final boolean DEBUG = false
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
 
     // TODO: Cleanup comments to only including those giving meaningful information.
     // Number of characters entered during a typing session
diff --git a/java/src/com/android/inputmethod/research/Uploader.java b/java/src/com/android/inputmethod/research/Uploader.java
index 152b94d..ba05ec1 100644
--- a/java/src/com/android/inputmethod/research/Uploader.java
+++ b/java/src/com/android/inputmethod/research/Uploader.java
@@ -46,10 +46,11 @@
  */
 public final class Uploader {
     private static final String TAG = Uploader.class.getSimpleName();
-    private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    private static final boolean DEBUG = false
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
     // Set IS_INHIBITING_AUTO_UPLOAD to true for local testing
     private static final boolean IS_INHIBITING_AUTO_UPLOAD = false
-            && ProductionFlag.IS_EXPERIMENTAL_DEBUG;  // Force false for non-debug builds
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
     private static final int BUF_SIZE = 1024 * 8;
 
     private final Context mContext;
diff --git a/java/src/com/android/inputmethod/research/UploaderService.java b/java/src/com/android/inputmethod/research/UploaderService.java
index 26b6510..6a9f5c1 100644
--- a/java/src/com/android/inputmethod/research/UploaderService.java
+++ b/java/src/com/android/inputmethod/research/UploaderService.java
@@ -30,7 +30,8 @@
  */
 public final class UploaderService extends IntentService {
     private static final String TAG = UploaderService.class.getSimpleName();
-    private static final boolean DEBUG = false && ProductionFlag.IS_EXPERIMENTAL_DEBUG;
+    private static final boolean DEBUG = false
+            && ProductionFlag.USES_DEVELOPMENT_ONLY_DIAGNOSTICS_DEBUG;
     public static final long RUN_INTERVAL = AlarmManager.INTERVAL_HOUR;
     public static final String EXTRA_UPLOAD_UNCONDITIONALLY = UploaderService.class.getName()
             + ".extra.UPLOAD_UNCONDITIONALLY";