How To Speak Elf is a comprehensive guide to the Elvish languages created by J.R.R. Tolkien for his Middle-earth legendarium. The book was written by David Salo, a linguist who worked on the Lord of the Rings film trilogy, and was published in 2009. The book provides a detailed overview of the grammar and vocabulary of Quenya and Sindarin, the two main Elvish languages, and also includes a section on the lesser-known Elvish languages such as Telerin and Nandorin.
How To Speak Elf has been praised by scholars for its accuracy and comprehensiveness, and has become a valuable resource for anyone interested in learning to speak Elvish. The book has also been used by filmmakers and game developers to create more authentic Elvish dialogue for their projects.