diff --git a/lib-src/mod-nyq-bench/NyqBench.cpp b/lib-src/mod-nyq-bench/NyqBench.cpp
index 2bdd16aa0..6d2c2f96c 100755
--- a/lib-src/mod-nyq-bench/NyqBench.cpp
+++ b/lib-src/mod-nyq-bench/NyqBench.cpp
@@ -1632,7 +1632,7 @@ bool NyqBench::Validate()
 {
    if (mScript->GetLastPosition() > 0 && mScript->IsModified()) {
       int ans;
-      ans = AudacityMessageBox(_("Code has been modified.  Are you sure?"),
+      ans = AudacityMessageBox(_("Code has been modified. Are you sure?"),
                          _("Warning"),
                          wxYES_NO | wxICON_QUESTION,
                          this);
diff --git a/src/FreqWindow.cpp b/src/FreqWindow.cpp
index 88e62757b..3aff2f0fc 100644
--- a/src/FreqWindow.cpp
+++ b/src/FreqWindow.cpp
@@ -618,7 +618,7 @@ void FreqWindow::GetAudio()
 
    if (warning) {
       wxString msg;
-      msg.Printf(_("Too much audio was selected.  Only the first %.1f seconds of audio will be analyzed."),
+      msg.Printf(_("Too much audio was selected. Only the first %.1f seconds of audio will be analyzed."),
                           (mDataLen / mRate));
       AudacityMessageBox(msg);
    }
diff --git a/src/ModuleManager.cpp b/src/ModuleManager.cpp
index d6d273ae6..ce0003ecb 100755
--- a/src/ModuleManager.cpp
+++ b/src/ModuleManager.cpp
@@ -114,7 +114,7 @@ bool Module::Load()
    if (versionFn == NULL){
       wxString ShortName = wxFileName( mName ).GetName();
       AudacityMessageBox(wxString::Format(_("The module %s does not provide a version string.\nIt will not be loaded."), ShortName), _("Module Unsuitable"));
-      wxLogMessage(wxString::Format(_("The module %s does not provide a version string.  It will not be loaded."), mName));
+      wxLogMessage(wxString::Format(_("The module %s does not provide a version string. It will not be loaded."), mName));
       mLib->Unload();
       return false;
    }
@@ -123,7 +123,7 @@ bool Module::Load()
    if( !moduleVersion.IsSameAs(AUDACITY_VERSION_STRING)) {
       wxString ShortName = wxFileName( mName ).GetName();
       AudacityMessageBox(wxString::Format(_("The module %s is matched with Audacity version %s.\n\nIt will not be loaded."), ShortName, moduleVersion), _("Module Unsuitable"));
-      wxLogMessage(wxString::Format(_("The module %s is matched with Audacity version %s.  It will not be loaded."), mName, moduleVersion));
+      wxLogMessage(wxString::Format(_("The module %s is matched with Audacity version %s. It will not be loaded."), mName, moduleVersion));
       mLib->Unload();
       return false;
    }
diff --git a/src/PluginManager.cpp b/src/PluginManager.cpp
index 2ea23d040..c990239c6 100644
--- a/src/PluginManager.cpp
+++ b/src/PluginManager.cpp
@@ -1837,7 +1837,7 @@ bool PluginManager::DropFile(const wxString &fileName)
 
             if (!copied) {
                ::AudacityMessageBox(
-                  _("Plug-in file is in use.  Failed to overwrite"));
+                  _("Plug-in file is in use. Failed to overwrite"));
                return true;
             }
 
diff --git a/src/Project.cpp b/src/Project.cpp
index a77c31cac..26189e36c 100644
--- a/src/Project.cpp
+++ b/src/Project.cpp
@@ -3915,7 +3915,7 @@ bool AudacityProject::DoSave (const bool fromSaveAs,
 
       if( !wxDir::Exists( projPath ) ){
          AudacityMessageBox(wxString::Format(
-            _("Could not save project. Path not found.  Try creating \ndirectory \"%s\" before saving project with this name."),
+            _("Could not save project. Path not found. Try creating \ndirectory \"%s\" before saving project with this name."),
             projPath),
                       _("Error Saving Project"),
                       wxICON_ERROR, this);
diff --git a/src/Theme.cpp b/src/Theme.cpp
index d29f82f70..888c468a8 100644
--- a/src/Theme.cpp
+++ b/src/Theme.cpp
@@ -1179,7 +1179,7 @@ void ThemeBase::SaveComponents()
       auto result =
          AudacityMessageBox(
             wxString::Format(
-               _("Some required files in:\n  %s\nwere already present.  Overwrite?"),
+               _("Some required files in:\n  %s\nwere already present. Overwrite?"),
                FileNames::ThemeComponentsDir()),
                AudacityMessageBoxCaptionStr(),
                wxYES_NO | wxNO_DEFAULT);
diff --git a/src/effects/VST/VSTEffect.cpp b/src/effects/VST/VSTEffect.cpp
index a02a78902..8a9fd5f4c 100644
--- a/src/effects/VST/VSTEffect.cpp
+++ b/src/effects/VST/VSTEffect.cpp
@@ -3737,7 +3737,7 @@ bool VSTEffect::HandleXMLTag(const wxChar *tag, const wxChar **attrs)
             if (value != GetSymbol().Internal())
             {
                wxString msg;
-               msg.Printf(_("This parameter file was saved from %s.  Continue?"), value);
+               msg.Printf(_("This parameter file was saved from %s. Continue?"), value);
                int result = AudacityMessageBox(msg, wxT("Confirm"), wxYES_NO, mParent);
                if (result == wxNO)
                {
diff --git a/src/export/Export.cpp b/src/export/Export.cpp
index baa1409e0..96fc1f782 100644
--- a/src/export/Export.cpp
+++ b/src/export/Export.cpp
@@ -694,7 +694,7 @@ bool Exporter::GetFilename()
       if (mFilename.FileExists()) {
          wxString prompt;
 
-         prompt.Printf(_("A file named \"%s\" already exists.  Replace?"),
+         prompt.Printf(_("A file named \"%s\" already exists. Replace?"),
                        mFilename.GetFullPath());
 
          int action = AudacityMessageBox(prompt,
diff --git a/src/import/ImportPCM.cpp b/src/import/ImportPCM.cpp
index 9905d1460..f5740741f 100644
--- a/src/import/ImportPCM.cpp
+++ b/src/import/ImportPCM.cpp
@@ -261,7 +261,7 @@ static wxString AskCopyOrEdit()
       ;
 
       wxString clause3 = _(
-"Reading the files directly allows you to play or edit them almost immediately.  "
+"Reading the files directly allows you to play or edit them almost immediately. "
 "This is less safe than copying in, because you must retain the files with their "
 "original names in their original locations.\n"
 "Help > Diagnostics > Check Dependencies will show the original names and locations of any files "
diff --git a/src/ondemand/ODWaveTrackTaskQueue.cpp b/src/ondemand/ODWaveTrackTaskQueue.cpp
index 4d28f206c..02eb55a55 100644
--- a/src/ondemand/ODWaveTrackTaskQueue.cpp
+++ b/src/ondemand/ODWaveTrackTaskQueue.cpp
@@ -333,7 +333,7 @@ void ODWaveTrackTaskQueue::FillTipForWaveTrack( const WaveTrack * t, wxString &t
    {
 
     //  if(GetNumTasks()==1)
-      mTipMsg.Printf(_("%s %2.0f%% complete.  Click to change task focal point."), GetFrontTask()->GetTip(), GetFrontTask()->PercentComplete()*100.0 );
+      mTipMsg.Printf(_("%s %2.0f%% complete. Click to change task focal point."), GetFrontTask()->GetTip(), GetFrontTask()->PercentComplete()*100.0 );
      // else
        //  msg.Printf(_("%s %d additional tasks remaining."), GetFrontTask()->GetTip(), GetNumTasks());
 
diff --git a/src/prefs/KeyConfigPrefs.cpp b/src/prefs/KeyConfigPrefs.cpp
index c674bd777..4dce07153 100644
--- a/src/prefs/KeyConfigPrefs.cpp
+++ b/src/prefs/KeyConfigPrefs.cpp
@@ -552,7 +552,7 @@ void KeyConfigPrefs::OnSet(wxCommandEvent & WXUNUSED(event))
          mManager->GetPrefixedLabelFromName(newname) );
       if (AudacityMessageBox(
             wxString::Format(
-            _("The keyboard shortcut '%s' is already assigned to:\n\n\t'%s'\n\nClick OK to assign the shortcut to\n\n\t'%s'\n\ninstead.  Otherwise, click Cancel."),
+            _("The keyboard shortcut '%s' is already assigned to:\n\n\t'%s'\n\nClick OK to assign the shortcut to\n\n\t'%s'\n\ninstead. Otherwise, click Cancel."),
             mKey->GetValue(),
             oldlabel,
             newlabel),
diff --git a/src/prefs/ThemePrefs.cpp b/src/prefs/ThemePrefs.cpp
index 7ad59d7f1..5ffc7cb76 100644
--- a/src/prefs/ThemePrefs.cpp
+++ b/src/prefs/ThemePrefs.cpp
@@ -98,7 +98,7 @@ void ThemePrefs::PopulateOrExchange(ShuttleGui & S)
 
 #ifdef __WXDEBUG__
       S.AddFixedText(
-         _("This is a debug version of Audacity, with an extra button, 'Output Sourcery'.  This will save a\nC version of the image cache that can be compiled in as a default.")
+         _("This is a debug version of Audacity, with an extra button, 'Output Sourcery'. This will save a\nC version of the image cache that can be compiled in as a default.")
          );
 #endif
 
diff --git a/src/toolbars/SelectionBar.cpp b/src/toolbars/SelectionBar.cpp
index 75f2ae67b..25bc60094 100644
--- a/src/toolbars/SelectionBar.cpp
+++ b/src/toolbars/SelectionBar.cpp
@@ -548,7 +548,7 @@ void SelectionBar::SetDrivers( int driver1, int driver2 )
       wxString Format = ( (id!=mDrive1) && (id!=mDrive2 ) ) ? _("%s - driven") : "%s";
       wxString Title= wxString::Format( Format, Temp );
       // i18n-hint: %s1 is replaced e.g by 'Length', %s2 e.g by 'Center'.
-      wxString VoiceOverText = wxString::Format(_("Selection %s.  %s won't change."), Temp, Text[fixed]);
+      wxString VoiceOverText = wxString::Format(_("Selection %s. %s won't change."), Temp, Text[fixed]);
       if( *Ctrls[i] ){
          (*Ctrls[i])->SetName( Temp );
       }
diff --git a/src/widgets/Ruler.cpp b/src/widgets/Ruler.cpp
index 5eb513f75..dc41be6db 100644
--- a/src/widgets/Ruler.cpp
+++ b/src/widgets/Ruler.cpp
@@ -2715,10 +2715,10 @@ namespace {
          // IsScrubbing is true if Scrubbing OR seeking.
          if( scrubber.IsScrubbing() )
             // User is dragging already, explain.
-            return _("Drag to Seek.  Release to stop seeking.");
+            return _("Drag to Seek. Release to stop seeking.");
          else
             // User has clicked but not yet moved or released.
-            return _("Drag to Seek.  Release and move to Scrub.");
+            return _("Drag to Seek. Release and move to Scrub.");
       }
       // Since mouse is up, mention moving first.
       return _("Move to Scrub. Drag to Seek.");