Learn the language, and encode messages so others can't read them!
Basically, each letter is encoded with the next letter. Don't understand? Here's the whole language.
A=B
B=C
C=D
D=E
E=F
F=G
G=H
H=I
I=J
J=K
K=L
L=M
M=N
N=O
O=P
P=Q
Q=R
R=S
T=U
U=V
V=W
W=X
Y=Z
Z= 1 (Theres no letter after Z.)
So, fohpz! (Thats encoded by the way)