you could always update your script using this more comprehensive text in your style format of script.
alias 1337talk {
set %hackmsg $$?=\"What would you like to be translated into 1337 talk?\"
set %hackmsg $replace(%hackmsg,a,@,b,c,,d,e,,f,=,g,9,h,-,i,j,_,k,<,l,7,m,/\/\,n,/,o,,p,q,,r,,s,,t,+,u,_,v,\/,w,/\,x,}{,y,z,2,A,@,B,C,,D,E,,F,=,G,9,H,-,I,J,_,K,<,L,7,M,/\/\,N,/,O,,P,Q,,R,,S,,T,+,U,_,V,\/,W,/\,X,}{,Y,Z,2,elite,1337)
msg $active %hackmsg
}

menu * {
1337 Talk: 1337talk
}