diff --git a/src/calibre/gui2/preferences/metadata_sources.py b/src/calibre/gui2/preferences/metadata_sources.py
index 743138685e..65d3683d82 100644
--- a/src/calibre/gui2/preferences/metadata_sources.py
+++ b/src/calibre/gui2/preferences/metadata_sources.py
@@ -347,7 +347,7 @@ class ConfigWidget(ConfigWidgetBase, Ui_Form):
         m.addAction(_('Tags')).triggered.connect(self.change_tag_map_rules)
         m.addAction(_('Authors')).triggered.connect(self.change_author_map_rules)
         m.addAction(_('Publisher')).triggered.connect(self.change_publisher_map_rules)
-        m.addAction(_('Series')).triggered.connect(self.change_series_map_rules)
+        m.addAction(ngettext('Series', 'Series', 1)).triggered.connect(self.change_series_map_rules)
         self.map_rules_button.setMenu(m)
         l = self.page.layout()
         l.setStretch(0, 1)
diff --git a/src/calibre/utils/formatter_functions.py b/src/calibre/utils/formatter_functions.py
index 3516562db4..5ea730f105 100644
--- a/src/calibre/utils/formatter_functions.py
+++ b/src/calibre/utils/formatter_functions.py
@@ -3355,7 +3355,7 @@ make_url_extended(
 [/CODE]
 giving you
 [CODE]
-https://your_host/your_path?encoded=Hendrik+B%C3%A4%C3%9Fler&unencoded=Hendrik Bäßler
+https://your_host/your_path?encoded=Hendrik+B%C3%A4%C3%9Fler&unencoded={0}
 [/CODE]
 
 You must have at least one ``query_name, query_value, how_to_encode`` triad, but can