Mwwy Jwan Bray Kampywtr | Danlwd

d→y, a→v, n→i, l→g, w→r, d→y → y vigry (one word) m→h, w→r, w→r, y→t → hrrt j→e, w→r, a→v, n→i → ervi b→w, r→m, a→v, y→t → wmvt k→f, a→v, m→h, p→k, y→t, w→r, t→o, r→m → fvhk trom

So maybe not ROT13. Given the phrase shape, maybe it's (a→f): danlwd mwwy jwan bray kampywtr

But maybe it’s (each letter shifted to a neighbor on QWERTY). d→y, a→v, n→i, l→g, w→r, d→y → y

It looks like you’ve written a phrase in (each letter is shifted or replaced). danlwd → qnayjq mwwy → zjjl jwan →

danlwd → qnayjq mwwy → zjjl jwan → wjna bray → oenl kampywtr → xnzcljge

Maybe not ROT13. d→i, a→f, n→s, l→q, w→b, d→i → ifsqbi — no. Step 5 — Try ROT-5 (shift 21, same as ROT5 backward) d→y, a→v, n→i, l→g, w→r, d→y → yvigry — no. Step 6 — Try ROT11 d→o, a→l, n→y, l→w, w→h, d→o → olywho — maybe? “only who”? Not quite.