diff --git a/src/Audio/AudioOutput.cc b/src/Audio/AudioOutput.cc
index 5f48d8f85ad517b402a8492ed5c86744eafdc293..4c892b5da416becdf47ffd09aa8bae77791b1d96 100644
--- a/src/Audio/AudioOutput.cc
+++ b/src/Audio/AudioOutput.cc
@@ -20,14 +20,12 @@ AudioOutput::AudioOutput(QGCApplication* app, QGCToolbox* toolbox)
     : QGCTool(app, toolbox)
     , _tts(new QTextToSpeech(this))
 {
-    _tts->setLocale(QLocale::system());
+    //-- Force TTS engine to English as all incoming messages from the autopilot
+    //   are in English and not localized.
+#ifdef Q_OS_LINUX
+    _tts->setLocale(QLocale("en_US"));
+#endif
     connect(_tts, &QTextToSpeech::stateChanged, this, &AudioOutput::_stateChanged);
-    connect(qgcApp(), &QGCApplication::languageChanged, this, &AudioOutput::_languageChanged);
-}
-
-void AudioOutput::_languageChanged(const QLocale locale)
-{
-    _tts->setLocale(locale);
 }
 
 bool AudioOutput::say(const QString& inText)
diff --git a/src/Audio/AudioOutput.h b/src/Audio/AudioOutput.h
index d3e0a34db108c4ae04938d8c7d4b38e650c1875e..b97d81f4e996581f518c3dae0083282e82f3c92d 100644
--- a/src/Audio/AudioOutput.h
+++ b/src/Audio/AudioOutput.h
@@ -33,7 +33,6 @@ public slots:
 
 private slots:
     void            _stateChanged           (QTextToSpeech::State state);
-    void            _languageChanged        (const QLocale locale);
 
 protected:
     QTextToSpeech*  _tts;
diff --git a/src/QGCApplication.cc b/src/QGCApplication.cc
index 6367e758f8247562c4e50123315a31433e566347..800462089497ae99b8d7de7182ce1bfa6f20aee6 100644
--- a/src/QGCApplication.cc
+++ b/src/QGCApplication.cc
@@ -42,7 +42,6 @@
 
 #include "QGC.h"
 #include "QGCApplication.h"
-#include "AudioOutput.h"
 #include "CmdLineOptParser.h"
 #include "UDPLink.h"
 #include "LinkManager.h"
diff --git a/src/Vehicle/Vehicle.cc b/src/Vehicle/Vehicle.cc
index cf12aee9098775b2028774bc555718d376bc1f34..8ff3632addad201ce29df2603d507625d00b1289 100644
--- a/src/Vehicle/Vehicle.cc
+++ b/src/Vehicle/Vehicle.cc
@@ -28,7 +28,6 @@
 #include "ParameterManager.h"
 #include "QGCApplication.h"
 #include "QGCImageProvider.h"
-#include "AudioOutput.h"
 #include "FollowMe.h"
 #include "MissionCommandTree.h"
 #include "QGroundControlQmlGlobal.h"
diff --git a/src/uas/UAS.cc b/src/uas/UAS.cc
index cb1101612634473c48c06d35b7d808cce2375bf2..16e80abf28ca5d640eda62547a3627aae6bd5795 100644
--- a/src/uas/UAS.cc
+++ b/src/uas/UAS.cc
@@ -26,7 +26,6 @@
 #include "UAS.h"
 #include "LinkInterface.h"
 #include "QGC.h"
-#include "AudioOutput.h"
 #include "MAVLinkProtocol.h"
 #include "QGCMAVLink.h"
 #include "LinkManager.h"