Sky Writing
from Zeldapedia, the Legend of Zelda wiki
Sky Writing is the written language of the Oocca in The Legend of Zelda: Twilight Princess. To complete the Ancient Sky Book, Link has to find various Sky Writing letters scattered throughout Hyrule. Each character is found underneath an Owl Statue, and are copied into the book when Link collects them. No actual translations of the Sky Writing are ever shown, but the writing is seen a few times in the game.
