All of the adaptations are a completely and fully alternate universe, there are no goblins singing about whips or goblin town in Tolkien’s universe, nor are there elephant surfing elf's or spiders turning into sexy lady’s. all of these things are in there own little universes that have no connection to each and no connection to Tolkien’s actual canon.
The differences might be in earlier period and telling a different story like shadow of Mordor did but that doesn’t actually have any barring on all of the adaptations being different universes that diverge in a ton of little and big ways from the actual canon.