The symbols found in Gravity Falls: Journal 3, created by Bill Cipher.
Gravity Falls and everything to do with it are the property of Disney.
-- Spoilers --
Bill drew this language in secret messages throughout the Journal, as well as a wheel which can be used for decoding.
The symbols found in Gravity Falls: Journal 3, created by the Author. At one point, the symbols can be translated to read "I call this Fordese."
Q and Z are not found anywhere in the Journal, so I used a rotated version of Bill's Wheel language.
Something is lurking in the shadows..