Explanation for those unfamiliar with Russophone online culture: in the Russian-speaking internet, Russia's gopniks (approximate equivalent of England's chavs) have for a long time been occasionally referred to as orcs or goblins. In the context of the Russian/Ukrainian conflict, this has expanded to anti-Putinist opposition and pro-Ukrainian trolls labeling pro-Putin Russians as orcs, and Russia itself as Mordor, land of the orcs. (Examples of usage: http://spektr.press/chto-eto-s-nimi/ http://grani.ru/opinion/portnikov/m.235880.html)

This also ties into an old Russian geek tradition of identifying fantasy-genre elves with America and the West (which is very obvious in some fictional universes; e.g. in Tolkien's works, Valinor geographically corresponds to North America), with the natural implication that orcs and goblins (the opponents of the elves) are Russians, and therefore basically good guys but tragically misunderstood by the world. See https://en.wikipedia.org/wiki/The_Last_Ringbearer for this viewpoint expanded into a novel.

So either google's algorithms had identified a sufficient number of humorous references to Russia as Mordor, or some intrepid band of trolls decided to google-bomb the algorithm to push this translation.