diff --git a/docs/ref/templates/builtins.txt b/docs/ref/templates/builtins.txt
index 3b650f1f69..2216b6efef 100644
--- a/docs/ref/templates/builtins.txt
+++ b/docs/ref/templates/builtins.txt
@@ -1794,6 +1794,8 @@ Example::
 
     You have {{ num_cherries }} cherr{{ num_cherries|pluralize:"y,ies" }}.
 
+.. note:: Use :ttag:`blocktrans` to pluralize translated strings.
+
 .. templatefilter:: pprint
 
 pprint
diff --git a/docs/topics/i18n/internationalization.txt b/docs/topics/i18n/internationalization.txt
index 559f60fcc5..4850f7e7bc 100644
--- a/docs/topics/i18n/internationalization.txt
+++ b/docs/topics/i18n/internationalization.txt
@@ -451,6 +451,8 @@ It's not possible to mix a template variable inside a string within ``{% trans
 %}``. If your translations require strings with variables (placeholders), use
 ``{% blocktrans %}`` instead.
 
+.. templatetag:: blocktrans
+
 ``blocktrans`` template tag
 ---------------------------