diff --git a/resources/default_tweaks.py b/resources/default_tweaks.py
index efb88cfcb3..d07a09297a 100644
--- a/resources/default_tweaks.py
+++ b/resources/default_tweaks.py
@@ -53,7 +53,7 @@ authors_completer_append_separator = False
 #  comma : use 'copy' if there is a ',' in the name, otherwise use 'invert'
 #  nocomma : "fn ln" -> "ln fn" (without the comma)
 # When this tweak is changed, the author_sort values stored with each author
-# must be recomputed by right-clicking on an author in the left-hand tags pane,
+# must be recomputed by right-clicking on an author in the left-hand tags panel,
 # selecting 'manage authors', and pressing 'Recalculate all author sort values'.
 # The author name suffixes are words that are ignored when they occur at the
 # end of an author name. The case of the suffix is ignored and trailing
@@ -79,10 +79,10 @@ author_name_copywords = ('Corporation', 'Company', 'Co.', 'Agency', 'Council',
 authors_split_regex = r'(?i),?\s+(and|with)\s+'
 
 #: Use author sort in Tag browser
-# Set which author field to display in the tags pane (the list of authors,
+# Set which author field to display in the tags panel (the list of authors,
 # series, publishers etc on the left hand side). The choices are author and
 # author_sort. This tweak affects only what is displayed under the authors
-# category in the tags pane and Content server. Please note that if you set this
+# category in the tags panel and Content server. Please note that if you set this
 # to author_sort, it is very possible to see duplicate names in the list because
 # although it is guaranteed that author names are unique, there is no such
 # guarantee for author_sort values. Showing duplicates won't break anything, but
diff --git a/src/calibre/gui2/actions/show_quickview.py b/src/calibre/gui2/actions/show_quickview.py
index d98b15c080..5a9a45f2c2 100644
--- a/src/calibre/gui2/actions/show_quickview.py
+++ b/src/calibre/gui2/actions/show_quickview.py
@@ -92,7 +92,7 @@ class ShowQuickviewAction(InterfaceAction):
         self.gui.addAction(self.focus_refresh_action)
         self.gui.keyboard.register_shortcut('Refresh from Quickview',
                      _('Refresh Quickview'),
-                     description=_('Refresh the information shown in the Quickview pane'),
+                     description=_('Refresh the information shown in the Quickview panel'),
                      action=self.focus_refresh_action,
                      group=self.action_spec[0])
         self.focus_refresh_action.triggered.connect(self.refill_quickview)
diff --git a/src/calibre/gui2/dialogs/quickview.py b/src/calibre/gui2/dialogs/quickview.py
index c82c60a07e..a7c1d76e3a 100644
--- a/src/calibre/gui2/dialogs/quickview.py
+++ b/src/calibre/gui2/dialogs/quickview.py
@@ -459,7 +459,7 @@ class Quickview(QDialog, Ui_Quickview):
 
     def _refresh(self, book_id, key):
         '''
-        Actually fill in the left-hand pane from the information in the
+        Actually fill in the left-hand panel from the information in the
         selected column of the selected book
         '''
         # Only show items for categories
@@ -558,7 +558,7 @@ class Quickview(QDialog, Ui_Quickview):
         self.books_table.blockSignals(True)
         tt = ('<p>' + _(
             'Double click on a book to change the selection in the library view or '
-              'change the column shown in the left-hand pane. '
+              'change the column shown in the left-hand panel. '
               'Shift- or Control- double click to edit the metadata of a book, '
               'which also changes the selected book.'
               ) + '</p>')