It looks like the string you provided — "Download- tjmyt nwdz lbt sghyrt wtkt tql wtqfsh..." — is not in plain English. It appears to be encoded, possibly with a simple substitution cipher like or an Atbash cipher .

Let’s instead try ROT-1 forward for encoding. If original = plain, "tjmyt" could be "sunny"? Let’s test "sunny" ROT+1: s+1=t, u+1=v (no, m? not match). So no. Given the gibberish look, it could be a (each letter replaced by one above on QWERTY). Let’s test:

t -> above t on QWERTY? Row: q w e r t y u i o p. Above t is 5? no — maybe below: below t is g? no, that’s not it.

t (20) → t(20) to t(20) = shift 0? no.

"tjmyt nwdz lbt sghyrt wtkt tql wtqfsh..."