The Rings of Power dialect coach explains the difference between Elvish and Orcish languages
Before there were any holes in the ground, any Hobbits in the four farthings of the Shire, or any legendarium detailing the creation of the fictional world of E, where Middle-earth is located, J.R.R. Tolkien was first and foremost fascinated with the construction of languages. In fact, one could argue that The Lord of the