diff --git a/src/calibre/ebooks/metadata/book/base.py b/src/calibre/ebooks/metadata/book/base.py
index 87eba2d388..808639b630 100644
--- a/src/calibre/ebooks/metadata/book/base.py
+++ b/src/calibre/ebooks/metadata/book/base.py
@@ -775,7 +775,7 @@ class Metadata(object):
         ans += [('ISBN', unicode_type(self.isbn))]
         ans += [(_('Tags'), ', '.join([unicode_type(t) for t in self.tags]))]
         if self.series:
-            ans += [(_('Series'), unicode_type(self.series) + ' #%s'%self.format_series_index())]
+            ans += [(ngettext('Series', 'Series', 1), unicode_type(self.series) + ' #%s'%self.format_series_index())]
         ans += [(_('Languages'), ', '.join(self.languages))]
         if self.timestamp is not None:
             ans += [(_('Timestamp'), unicode_type(isoformat(self.timestamp, as_utc=False, sep=' ')))]
diff --git a/src/calibre/ebooks/oeb/transforms/jacket.py b/src/calibre/ebooks/oeb/transforms/jacket.py
index 24f1aa9143..6fde4ac120 100644
--- a/src/calibre/ebooks/oeb/transforms/jacket.py
+++ b/src/calibre/ebooks/oeb/transforms/jacket.py
@@ -289,7 +289,7 @@ def render_jacket(mi, output_profile,
                     author=author,
                     publisher=publisher,
                     pubdate_label=_('Published'), pubdate=pubdate,
-                    series_label=_('Series'), series=series,
+                    series_label=ngettext('Series', 'Series', 1), series=series,
                     rating_label=_('Rating'), rating=rating,
                     tags_label=_('Tags'), tags=tags,
                     comments=comments,
diff --git a/src/calibre/gui2/preferences/create_custom_column.py b/src/calibre/gui2/preferences/create_custom_column.py
index 5df4752910..65417b28bc 100644
--- a/src/calibre/gui2/preferences/create_custom_column.py
+++ b/src/calibre/gui2/preferences/create_custom_column.py
@@ -232,7 +232,7 @@ class CreateCustomColumn(QDialog):
         text = '<p>'+_('Quick create:')
         for col, name in [('isbn', _('ISBN')), ('formats', _('Formats')),
                 ('yesno', _('Yes/No')),
-                ('tags', _('Tags')), ('series', _('Series')), ('rating',
+                ('tags', _('Tags')), ('series', ngettext('Series', 'Series', 1)), ('rating',
                     _('Rating')), ('people', _("Names")), ('text', _('Short text'))]:
             text += ' <a href="col:%s">%s</a>,'%(col, name)
         text = text[:-1]
diff --git a/src/calibre/gui2/search_restriction_mixin.py b/src/calibre/gui2/search_restriction_mixin.py
index b6a381092a..a988d63a94 100644
--- a/src/calibre/gui2/search_restriction_mixin.py
+++ b/src/calibre/gui2/search_restriction_mixin.py
@@ -133,7 +133,7 @@ class CreateVirtualLibrary(QDialog):  # {{{
             '<a href="publisher.{2}">{2}</a>, '
             '<a href="series.{3}">{3}</a>, '
             '<a href="search.{4}">{4}</a>.').format(_('Authors'), _('Tags'),
-                                            _('Publishers'), _('Series'), _('Saved searches')))
+                                            _('Publishers'), ngettext('Series', 'Series', 2), _('Saved searches')))
         sl.setWordWrap(True)
         sl.setTextInteractionFlags(Qt.LinksAccessibleByMouse)
         sl.linkActivated.connect(self.link_activated)
diff --git a/src/calibre/gui2/tag_browser/ui.py b/src/calibre/gui2/tag_browser/ui.py
index f86e2fb83d..e93090890d 100644
--- a/src/calibre/gui2/tag_browser/ui.py
+++ b/src/calibre/gui2/tag_browser/ui.py
@@ -37,7 +37,7 @@ class TagBrowserMixin(object):  # {{{
         for text, func, args, cat_name in (
              (_('Authors'),
                         self.do_author_sort_edit, (self, None), 'authors'),
-             (_('Series'),
+             (ngettext('Series', 'Series', 2),
                         self.do_tags_list_edit, (None, 'series'), 'series'),
              (_('Publishers'),
                         self.do_tags_list_edit, (None, 'publisher'), 'publisher'),
diff --git a/src/calibre/library/catalogs/epub_mobi_builder.py b/src/calibre/library/catalogs/epub_mobi_builder.py
index 02e4050456..f141f341f3 100644
--- a/src/calibre/library/catalogs/epub_mobi_builder.py
+++ b/src/calibre/library/catalogs/epub_mobi_builder.py
@@ -349,7 +349,7 @@ class CatalogBuilder(object):
         if self.opts.generate_titles:
             self.generate_ncx_by_title(_("Titles"))
         if self.opts.generate_series:
-            self.generate_ncx_by_series(_("Series"))
+            self.generate_ncx_by_series(ngettext('Series', 'Series', 2))
         if self.opts.generate_genres:
             self.generate_ncx_by_genre(_("Genres"))
         if self.opts.generate_recently_added:
@@ -2354,7 +2354,7 @@ class CatalogBuilder(object):
          content/BySeries.html (file)
 
         """
-        friendly_name = _("Series")
+        friendly_name = ngettext('Series', 'Series', 2)
         self.update_progress_full_step("%s HTML" % friendly_name)
 
         self.opts.sort_by = 'series'