Gothic
From Tolkien Gateway
Gothic was the language of the Goths; the oldest known Germanic language, it is now extinct and left no descendants.
Gothic was the first language that J.R.R. Tolkien studied for his own pleasure, and it may have given an impulsion in the first development of Qenya. Tolkien even attempted to reconstruct some parts of the language. He even composed a poem, Bagme Bloma "The Flower of the Trees"
In Lord of the Rings, Tolkien used Gothic to represent the Mannish languages of Rhovanion in the Third Age; names like Vidumavi or Vidugavia are of Gothic etymology.
