There are many forms of elvish, but Sindarin, and Quenyan are the main two. Sindarin is known as the (Common Elvish). It was used in the movies, and might also be in the books. Quenyan was used from the ancient elves from across the sea. It is almost dead now in middle earth, but the ancient elves from across the sea used it all the time.
Study the Ancient Language of the Elves!
Basic words, and phrases