Fixed #26403 -- Removed translated content in "Invalid block tag" message.

django/template/base.py

@@ -564,7 +564,7 @@ class Parser(object):
                 "forget to register or load this tag?" % (
                     token.lineno,
                     command,
-                    get_text_list(["'%s'" % p for p in parse_until]),
+                    get_text_list(["'%s'" % p for p in parse_until], 'or'),
                 ),
             )
         raise self.error(