Nandorin is a constructed language devised by J. R. R. Tolkien. It is one of the many fictional language set in his Secondary world, often called Middle-earth.
In the setting of Tolkien's works, Nandorin is the language of the Nandor Elves. It gradually disappeared from Middle-earth after the end of the First Age, when Sindar elves merged with the Silvan folk and were taken as their lords. Nandorin/Silvan gradually became extinct, surviving only in placenames such as Laurelindórinan/Lindórinand (old names for Lórien) and proper names such as Amroth. The daily tongue of the Silvan elves became Sindarin, or Sindarin with some Silvan influences.
Read more about this topic: Nandor (Middle-earth)