lbt — ‘lbt’ = ‘lob it’? unlikely. jyms — ‘jyms’ = ‘gyms’? (j=g?). bwnd — ‘bwnd’ = ‘beyond’? (bwnd → b w n d, add e o? ‘beyond’ has 6 letters). Actually, let’s test Caesar cipher with shift of +1 (a→b) but backwards? No, systematic:
thmyl lbt jyms bwnd llandrwyd mn mydya fayr → guzly yog wlzf ojaq yyynaejql za zlqln snle — no. Search: Llandrwyd not real, but Llandrindod is. Could be Llan + drwyd (drwyd = through? in Welsh ‘drwyddo’ = through it). bwnd could be bwnd (band). jyms might be gyms . mydya might be media .
Maybe the cipher is: each letter shifted by -1, but with vowels shifted differently? Unlikely. thmyl lbt jyms bwnd llandrwyd mn mydya fayr
thmyl — try: th→the? myl → my ? The y as vowel. Reverse each word:
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 . lbt — ‘lbt’ = ‘lob it’
t (20) → g (7) h (8) → u (21) m (13) → z (26) y (25) → l (12) l (12) → y (25)
t (20) → q h (8) → e m (13) → j y (25) → v l (12) → i ‘beyond’ has 6 letters)
thmyl → lymht (no) lbt → tbl jyms → smyj bwnd → dnwb llandrwyd → dywrdnall mn → nm mydya → aydym fayr → ryaf