diff --git a/src/calibre/devices/kobo/driver.py b/src/calibre/devices/kobo/driver.py
index dbe3b89c4b..518430b375 100644
--- a/src/calibre/devices/kobo/driver.py
+++ b/src/calibre/devices/kobo/driver.py
@@ -125,11 +125,11 @@ class KOBO(USBMS):
             ' in the database.  With this option calibre will show the '
             'expired records and allow you to delete them with '
             'the new delete logic.'),
-        _('Show Previews') + ':::'+_(
+        _('Show previews') + ':::'+_(
             'Kobo previews are included on the Touch and some other versions'
             ' by default they are no longer displayed as there is no good reason to '
             'see them.  Enable if you wish to see/delete them.'),
-        _('Show Recommendations') + ':::'+_(
+        _('Show recommendations') + ':::'+_(
             'Kobo now shows recommendations on the device. In some cases these have '
             'files but in other cases they are just pointers to the web site to buy. '
             'Enable if you wish to see/delete them.'),
diff --git a/src/calibre/devices/smart_device_app/driver.py b/src/calibre/devices/smart_device_app/driver.py
index 0011edc32a..74c2d347ed 100644
--- a/src/calibre/devices/smart_device_app/driver.py
+++ b/src/calibre/devices/smart_device_app/driver.py
@@ -172,7 +172,7 @@ class SDBook(Book):
 
 class SMART_DEVICE_APP(DeviceConfig, DevicePlugin):
     name = 'SmartDevice App Interface'
-    gui_name = _('Wireless Device')
+    gui_name = _('Wireless device')
     gui_name_template = '%s: %s'
 
     icon = I('devices/tablet.png')
diff --git a/src/calibre/gui2/actions/polish.py b/src/calibre/gui2/actions/polish.py
index 821a97e361..aca1f415df 100644
--- a/src/calibre/gui2/actions/polish.py
+++ b/src/calibre/gui2/actions/polish.py
@@ -130,9 +130,9 @@ class Polish(QDialog):  # {{{
         self.bb = bb = QDialogButtonBox(QDialogButtonBox.Ok|QDialogButtonBox.Cancel)
         bb.accepted.connect(self.accept)
         bb.rejected.connect(self.reject)
-        self.save_button = sb = bb.addButton(_('&Save Settings'), bb.ActionRole)
+        self.save_button = sb = bb.addButton(_('&Save settings'), bb.ActionRole)
         sb.clicked.connect(self.save_settings)
-        self.load_button = lb = bb.addButton(_('&Load Settings'), bb.ActionRole)
+        self.load_button = lb = bb.addButton(_('&Load settings'), bb.ActionRole)
         self.load_menu = QMenu(lb)
         lb.setMenu(self.load_menu)
         self.all_button = b = bb.addButton(_('Select &all'), bb.ActionRole)