Sipher translate

Siphenise shifts all the letters of the alphabet in a random sequence. For example,

A=Z, B=X, C=D, D=Y, E=G, F=Q, G=A and so forth! Lingojam maker, feel free to randomise the rest of the letters!

I would love to receive advice on how to make this better! E-mail me at seb.j.jones49@gmail.com to assist!