Has anyone ever "deciphered" a paragraph?

[Mark Knowles]

Copying from a cipher key generated from enciphered letters:

se -> XI
mi -> XIIII
qua -> XX
si -> XVIIII
su -> XXIIII
te -> LVII
to -> LXII
tu -> LXVI
toc -> LXIIII
sent -> XVIII
tuc -> LXVIII
mus -> XLVIII
tam -> LII
sen -> XIIII
is -> LIII
est -> XXIII
set -> XVII
sum -> XXVI
cum -> X

This is a word prefix, suffix and individual word mapping to a roman numeral structure. I believe that this kind of mapping can lead to reduced entropy.