Teliya Nevashi

Teliya Nevashi ("Nevashi Language") or just Nevashi (in English) is both a personal language for use on Earth (in a form called Teliya Nevashi Ashea'el), and a fictional language set on an island called Nevash in the imaginary world of Ianea (in a form called Teliya Nevashi Ianeni). There's some sort of (fictional) connection between the two worlds, but what exactly the nature of that is remains unknown.