Broken links with the same ending. Where are they from?

Question

WordPress

Website: visualmethod.ru powered by wordpress
Strange internal links with the same ending "/to" have been appearing in the webmaster for about three weeks now. The skin is
attached. Where can these links come from?

Answer 1

List of installed plugins, let's try to poVangovat.
Well, the screen settings of the site, all 5 pages of settings.
Comments, I hope, were disabled immediately after the installation of the engine?))))

Answer 2

It was enough to ask a question here, how the problem was found.
It's just that I once entered this link "/by" on the button in the menu a long time ago. And it turns out that it was shown on all the villages.
Thanks