diff --git a/src/Audio/AudioOutput.cc b/src/Audio/AudioOutput.cc
index 6fb95195df2ca92d80a4f9d07903206dca0b0d06..18455653e06dd551a7e94e8a9798b3a8a8c39b83 100644
--- a/src/Audio/AudioOutput.cc
+++ b/src/Audio/AudioOutput.cc
@@ -20,6 +20,11 @@ AudioOutput::AudioOutput(QGCApplication* app, QGCToolbox* toolbox)
     : QGCTool(app, toolbox)
     , _tts(new QTextToSpeech(this))
 {
+    //-- 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);
 }