Can you translate into elvish?
Yes, actually there is this type of writting called "Tengwar", used and created by Tolkien. There is also the Feanorian script, and a lengthy list of words in the back of the Silmarillion. In theory it would be possible to read and speak elvish, but although a brilliant creation, it is not a fully functioning language(s). See the Appendixes to the Lord of the Rings, the Silmarillion, and the Histories of Middle-earth for more information.But, if you wish to not just learn the writing system, but actually learn one of the Elvish languages (Sindarin or Quenya), then there are many online, free-to-download courses online. Try Pedin Edhellen for Sindarin, or Quetin i Lambe Eldaiva for Quenya.