thmyl — try: th→the? myl → my ? The y as vowel. Reverse each word:
Maybe the cipher is: each letter shifted by -1, but with vowels shifted differently? Unlikely.
t (20) → g (7) h (8) → u (21) m (13) → z (26) y (25) → l (12) l (12) → y (25) thmyl lbt jyms bwnd llandrwyd mn mydya fayr
t→o, h→c, m→h, y→t, l→g → ocht g — no. Look at fayr → likely fair (y→i, common in archaic spelling). mydya → could be media (d→e? No). But mydya → if y=e, then medea (a name). llandrwyd — Welsh place name: Llandrwyd (real? Llandrwyd doesn’t exist, but Llanrwst, Llandrindod). Possibly llandrwyd → Llandrwyd as a proper noun.
Check fayr — if Welsh, ‘fair’ means ‘next’ or ‘beautiful’ (soft mutation of ‘mae’). mydya — ‘myd’ (meed) is not Welsh; but ‘my’ = my, ‘dya’? mn — in Welsh = ‘if’ (os, not mn). bwnd — in Welsh = band? ‘Bwnd’ not standard, but ‘bwn’ = load, ‘bwnd’ might be ‘bwnd’? jyms — not Welsh (no j in traditional Welsh). thmyl — try: th→the
But apply ROT13 to all:
qejvi — nonsense.
t (20) → q h (8) → e m (13) → j y (25) → v l (12) → i
Still nonsense. But note llandrwyd — Welsh has ll as a single phoneme, dd as voiced ‘th’, wy as ‘oo-ee’ sound. This suggests the plaintext might be Welsh or pseudo-Welsh . Reverse each word: Maybe the cipher is: each