diff --git a/src/calibre/gui2/book_details.py b/src/calibre/gui2/book_details.py
index 714d7c66f6..5381cd8800 100644
--- a/src/calibre/gui2/book_details.py
+++ b/src/calibre/gui2/book_details.py
@@ -421,7 +421,7 @@ class CoverView(QWidget):  # {{{
         except:
             sz = QSize(0, 0)
         self.setToolTip(
-            '<p>'+_('Double-click to open Book Details window') +
+            '<p>'+_('Double-click to open the book details window') +
             '<br><br>' + _('Path') + ': ' + current_path +
             '<br><br>' + _('Cover size: %(width)d x %(height)d')%dict(
                 width=sz.width(), height=sz.height())
diff --git a/src/calibre/gui2/convert/search_and_replace.py b/src/calibre/gui2/convert/search_and_replace.py
index b7684ffef6..6bc079f530 100644
--- a/src/calibre/gui2/convert/search_and_replace.py
+++ b/src/calibre/gui2/convert/search_and_replace.py
@@ -126,9 +126,9 @@ class SearchAndReplaceWidget(Widget, Ui_Form):
 
     def sr_save_clicked(self):
         filename = choose_save_file(self, 'sr_saved_patterns',
-                _('Save calibre Search-Replace definitions file'),
+                _('Save calibre search-replace definitions file'),
                 filters=[
-                    (_('calibre Search-Replace definitions file'), ['csr'])
+                    (_('calibre search-replace definitions file'), ['csr'])
                     ])
         if filename:
             with codecs.open(filename, 'w', 'utf-8') as f:
diff --git a/src/calibre/gui2/dialogs/choose_format.py b/src/calibre/gui2/dialogs/choose_format.py
index 094ac09d2d..a01783a04f 100644
--- a/src/calibre/gui2/dialogs/choose_format.py
+++ b/src/calibre/gui2/dialogs/choose_format.py
@@ -16,7 +16,7 @@ class ChooseFormatDialog(QDialog):
         QDialog.__init__(self, window)
         self.resize(507, 377)
         self.setWindowIcon(QIcon(I("mimetypes/unknown.png")))
-        self.setWindowTitle(_('Choose Format'))
+        self.setWindowTitle(_('Choose format'))
         self.l = l = QVBoxLayout(self)
         self.msg = QLabel(msg)
         l.addWidget(self.msg)
@@ -28,7 +28,7 @@ class ChooseFormatDialog(QDialog):
         h.setContentsMargins(0, 0, 0, 0)
         l.addLayout(h)
         if show_open_with:
-            self.owb = QPushButton(_('&Open With...'), self)
+            self.owb = QPushButton(_('&Open with...'), self)
             self.formats.currentRowChanged.connect(self.update_open_with_button)
             h.addWidget(self.owb)
             self.own = QMenu(self.owb.text())
@@ -60,11 +60,11 @@ class ChooseFormatDialog(QDialog):
         else:
             menu.addSeparator()
             menu.addAction(_('Add other application for %s files...') % fmt.upper(), self.choose_open_with)
-            menu.addAction(_('Edit Open With applications...'), partial(edit_programs, fmt, self))
+            menu.addAction(_('Edit "Open with" applications...'), partial(edit_programs, fmt, self))
 
     def update_open_with_button(self):
         fmt = self._formats[self.formats.currentRow()]
-        self.owb.setText(_('Open %s With...') % fmt)
+        self.owb.setText(_('Open %s with...') % fmt)
 
     def open_with(self, entry):
         self.open_with_format = (self._formats[self.formats.currentRow()], entry)
@@ -94,6 +94,7 @@ class ChooseFormatDialog(QDialog):
         self._format = self._formats[self.formats.currentRow()]
         return QDialog.accept(self)
 
+
 if __name__ == '__main__':
     from calibre.gui2 import Application
     app = Application([])
diff --git a/src/calibre/gui2/dialogs/choose_format_device.ui b/src/calibre/gui2/dialogs/choose_format_device.ui
index a2a07e414a..93b0e5ee56 100644
--- a/src/calibre/gui2/dialogs/choose_format_device.ui
+++ b/src/calibre/gui2/dialogs/choose_format_device.ui
@@ -11,7 +11,7 @@
    </rect>
   </property>
   <property name="windowTitle">
-   <string>Choose Format</string>
+   <string>Choose format</string>
   </property>
   <property name="windowIcon">
    <iconset resource="../../../../resources/images.qrc">
diff --git a/src/calibre/gui2/dialogs/custom_recipes.py b/src/calibre/gui2/dialogs/custom_recipes.py
index 2bb73be502..16901e6644 100644
--- a/src/calibre/gui2/dialogs/custom_recipes.py
+++ b/src/calibre/gui2/dialogs/custom_recipes.py
@@ -494,7 +494,7 @@ class CustomRecipes(Dialog):
         else:
             bb.setStandardButtons(bb.Cancel | bb.Save)
             if self.stack.currentIndex() == 1:
-                text = _('S&witch to Advanced mode')
+                text = _('S&witch to advanced mode')
                 tooltip = _('Edit this recipe in advanced mode')
                 receiver = self.switch_to_advanced
                 b = bb.addButton(text, bb.ActionRole)
diff --git a/src/calibre/gui2/dialogs/plugin_updater.py b/src/calibre/gui2/dialogs/plugin_updater.py
index 3bc09171c0..83d8072c95 100644
--- a/src/calibre/gui2/dialogs/plugin_updater.py
+++ b/src/calibre/gui2/dialogs/plugin_updater.py
@@ -125,7 +125,7 @@ class ImageTitleLayout(QHBoxLayout):
         pixmap.load(I(icon_name))
         if pixmap is None:
             error_dialog(parent, _('Restart required'),
-                         _('You must restart Calibre before using this plugin!'), show=True)
+                         _('You must restart calibre before using this plugin!'), show=True)
         else:
             title_image_label.setPixmap(pixmap)
         title_image_label.setMaximumSize(32, 32)
@@ -277,7 +277,7 @@ class DisplayPluginModel(QAbstractTableModel):
         QAbstractTableModel.__init__(self)
         self.display_plugins = display_plugins
         self.headers = map(unicode, [_('Plugin Name'), _('Donate'), _('Status'), _('Installed'),
-                                      _('Available'), _('Released'), _('Calibre'), _('Author')])
+                                      _('Available'), _('Released'), _('calibre'), _('Author')])
 
     def rowCount(self, *args):
         return len(self.display_plugins)
@@ -363,7 +363,7 @@ class DisplayPluginModel(QAbstractTableModel):
         if not display_plugin.is_valid_platform():
             return _('Platform unavailable')
         if not display_plugin.is_valid_calibre():
-            return _('Calibre upgrade required')
+            return _('calibre upgrade required')
         if display_plugin.is_installed():
             if display_plugin.is_deprecated:
                 return _('Plugin deprecated')
@@ -408,7 +408,7 @@ class DisplayPluginModel(QAbstractTableModel):
                             ', '.join(display_plugin.platforms)+'\n\n'+
                             _('Right-click to see more options'))
         if numeric_version < display_plugin.calibre_required_version:
-            return (_('You must upgrade to at least Calibre %s before installing this plugin') %
+            return (_('You must upgrade to at least calibre %s before installing this plugin') %
                             self._get_display_version(display_plugin.calibre_required_version)+'\n\n'+
                             _('Right-click to see more options'))
         if display_plugin.installed_version < display_plugin.available_version:
@@ -756,7 +756,7 @@ class PluginUpdaterDialog(SizePersistedDialog):
                          _('A problem occurred while installing this plugin.'
                            ' This plugin will now be uninstalled.'
                            ' Please post the error message in details below into'
-                           ' the forum thread for this plugin and restart Calibre.'),
+                           ' the forum thread for this plugin and restart calibre.'),
                          det_msg=traceback.format_exc(), show=True)
             if DEBUG:
                 prints('Due to error now uninstalling plugin: %s'%display_plugin.name)