Fylm Bajyraw Mastany Mtrjm Lwdy Nt ⟶

Applying systematically (assuming English QWERTY): f→d, y→t, l→k, m→n, space, b→v, a→ , j→h, y→t, r→e, a→ , w→q, space, m→n, a→ , s→a, t→r, a→ , n→b, y→t, space, m→n, t→r, r→e, j→h, m→n, space, l→k, w→q, d→s, y→t, space, n→b, t→r

Given the context you provided without extra hints, the most plausible straightforward answer is that it's a where each letter is replaced by the key to its left on QWERTY: fylm bajyraw mastany mtrjm lwdy nt

If you need, I can run a brute-force Caesar or Atbash cipher on it — just let me know. — though it's not perfect English

The string you provided — "fylm bajyraw mastany mtrjm lwdy nt" — appears to be a keyboard-shifted or scrambled phrase. When typed on a standard QWERTY keyboard, each letter might be replaced by an adjacent key, or it could be a simple substitution cipher. Applying systematically (assuming English QWERTY): f→d

— though it's not perfect English.

That yields: "dtkn v hte q n arbt nrehn kqst br"` — nonsense.