1) Fictional language 
Aklo is the name of a fictional language that has been used by many authors from its first reference in 1899. The language is said to have mystical powers. Aklo was first mentioned by Arthur Machen in his 1899 story `The White People.` H. P. Lovecraft admired the Machen story, and used Aklo in his Cthulhu Mythos stories `The Dunwich Horror` an...