Another thought: Maybe it's a simple atbash cipher (A↔Z, B↔Y, etc.). Try atbash on nwdz : n↔m, w↔d, d↔w, z↔a → mdwa — no.
Reverse word order: alba fy tnam w mlt tql lbwt lbt nwdz Reverse each word’s letters: abla yf mant w tlm lqt twbl tbl zdwn
If you’d like, I can try a brute-force Caesar shift on the original string to see if it yields English. Just let me know.
