diff --git a/core/java/android/speech/tts/TextToSpeech.java b/core/java/android/speech/tts/TextToSpeech.java
index 0db2198..9e04cf8 100755
--- a/core/java/android/speech/tts/TextToSpeech.java
+++ b/core/java/android/speech/tts/TextToSpeech.java
@@ -410,17 +410,17 @@
         mCachedParams[Engine.PARAM_POSITION_UTTERANCE_ID] = Engine.KEY_PARAM_UTTERANCE_ID;
         mCachedParams[Engine.PARAM_POSITION_ENGINE] = Engine.KEY_PARAM_ENGINE;
 
-        mCachedParams[Engine.PARAM_POSITION_RATE + 1] =
-                String.valueOf(Engine.DEFAULT_RATE);
-        // initialize the language cached parameters with the current Locale
-        Locale defaultLoc = Locale.getDefault();
-        mCachedParams[Engine.PARAM_POSITION_LANGUAGE + 1] = defaultLoc.getISO3Language();
-        mCachedParams[Engine.PARAM_POSITION_COUNTRY + 1] = defaultLoc.getISO3Country();
-        mCachedParams[Engine.PARAM_POSITION_VARIANT + 1] = defaultLoc.getVariant();
+        // Leave all defaults that are shown in Settings uninitialized so that
+        // the values set in Settings will take effect if the application does
+        // not try to change these settings itself.
+        mCachedParams[Engine.PARAM_POSITION_RATE + 1] = "";
+        mCachedParams[Engine.PARAM_POSITION_LANGUAGE + 1] = "";
+        mCachedParams[Engine.PARAM_POSITION_COUNTRY + 1] = "";
+        mCachedParams[Engine.PARAM_POSITION_VARIANT + 1] = "";
         mCachedParams[Engine.PARAM_POSITION_STREAM + 1] =
                 String.valueOf(Engine.DEFAULT_STREAM);
         mCachedParams[Engine.PARAM_POSITION_UTTERANCE_ID + 1] = "";
-        mCachedParams[Engine.PARAM_POSITION_ENGINE + 1] = Engine.DEFAULT_SYNTH;
+        mCachedParams[Engine.PARAM_POSITION_ENGINE + 1] = "";
 
         initTts();
     }
diff --git a/packages/TtsService/src/android/tts/TtsService.java b/packages/TtsService/src/android/tts/TtsService.java
index c0e4cc0..7f76425 100755
--- a/packages/TtsService/src/android/tts/TtsService.java
+++ b/packages/TtsService/src/android/tts/TtsService.java
@@ -206,6 +206,9 @@
 
     private int setEngine(String enginePackageName) {
         String soFilename = "";
+        if (isDefaultEnforced()) {
+            enginePackageName = getDefaultEngine();
+        }
         // The SVOX TTS is an exception to how the TTS packaging scheme works
         // because it is part of the system and not a 3rd party add-on; thus
         // its binary is actually located under /system/lib/
@@ -779,12 +782,19 @@
                     if (mKillList.get(speechItem) == null) {
                         if (engine.length() > 0) {
                             setEngine(engine);
+                        } else {
+                            setEngine(getDefaultEngine());
                         }
                         if (language.length() > 0){
                             setLanguage("", language, country, variant);
+                        } else {
+                            setLanguage("", getDefaultLanguage(), getDefaultCountry(),
+                                    getDefaultLocVariant());
                         }
                         if (speechRate.length() > 0){
                             setSpeechRate("", Integer.parseInt(speechRate));
+                        } else {
+                            setSpeechRate("", getDefaultRate());
                         }
                         try {
                             sNativeSynth.speak(speechItem.mText, streamType);
@@ -864,12 +874,19 @@
                     if (mKillList.get(speechItem) == null){
                         if (engine.length() > 0) {
                             setEngine(engine);
+                        } else {
+                            setEngine(getDefaultEngine());
                         }
                         if (language.length() > 0){
                             setLanguage("", language, country, variant);
+                        } else {
+                            setLanguage("", getDefaultLanguage(), getDefaultCountry(),
+                                    getDefaultLocVariant());
                         }
                         if (speechRate.length() > 0){
                             setSpeechRate("", Integer.parseInt(speechRate));
+                        } else {
+                            setSpeechRate("", getDefaultRate());
                         }
                         try {
                             sNativeSynth.synthesizeToFile(speechItem.mText, speechItem.mFilename);