Fixed #25933 -- Allowed an unprefixed default language in i18n_patterns().

docs/releases/1.10.txt

@@ -248,6 +248,10 @@ Internationalization
   used in a root URLConf specified using :attr:`request.urlconf
   <django.http.HttpRequest.urlconf>`.
 
+* By setting the new ``prefix_default_language`` parameter for
+  :func:`~django.conf.urls.i18n.i18n_patterns` to ``False``, you can allow
+  accessing the default language without a URL prefix.
+
 Management Commands
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