The writing system J.R.R. Tolkien created for languages such as Quenya and Sindarin is Tengwar.
Tengwar is an artificial script whose name means “letters” in Quenya. Tolkien designed it with different modes so that it could represent several languages, including Quenya, Sindarin, English, and Black Speech.
The script is associated in the legendarium with the elf Fëanor, who is credited with devising it. Its letter shapes and usage appear in inscriptions, title pages, maps, and decorative writing connected with Middle-earth.
Tengwar is often confused with Cirth, another Tolkien script. Cirth consists largely of angular runes and is especially associated with the dwarves, while Tengwar is the flowing script most frequently seen in Tolkien-inspired calligraphy.