Tweaks to SystemStats::getDisplayLanguage() on android/linux to return a two-part identifier in the same way as other platforms.

modules/juce_core/native/juce_android_SystemStats.cpp

@@ -273,7 +273,7 @@ String SystemStats::getComputerName()
 
 String SystemStats::getUserLanguage()    { return AndroidStatsHelpers::getLocaleValue (false); }
 String SystemStats::getUserRegion()      { return AndroidStatsHelpers::getLocaleValue (true); }
-String SystemStats::getDisplayLanguage() { return getUserLanguage(); }
+String SystemStats::getDisplayLanguage() { return getUserLanguage() + "-" + getUserRegion(); }
 
 //==============================================================================
 void CPUInformation::initialise() noexcept

modules/juce_core/native/juce_linux_SystemStats.cpp

@@ -139,7 +139,7 @@ static String getLocaleValue (nl_item key)
 
 String SystemStats::getUserLanguage()    { return getLocaleValue (_NL_IDENTIFICATION_LANGUAGE); }
 String SystemStats::getUserRegion()      { return getLocaleValue (_NL_IDENTIFICATION_TERRITORY); }
-String SystemStats::getDisplayLanguage() { return getUserLanguage(); }
+String SystemStats::getDisplayLanguage() { return getUserLanguage() + "-" + getUserRegion(); }
 
 //==============================================================================
 void CPUInformation::initialise() noexcept