Page not found (404)

Request Method: GET
Request URL: http://diplomaticdictionary.com/dictionary/%D0%BD%D0%B0%D1%82%D0%BE-%D1%80%D0%B0%D1%81%D1%88%D0%B8%D1%80%D0%B5%D0%BD%D0%B8%D0%B5/
Raised by: wagtail.core.views.serve

You're seeing this error because you have DEBUG = True in your Django settings file. Change that to False, and Django will display a standard 404 page.