Thmyl Tryf Tabt Kanwn G2410 -
Atbash (A=Z, B=Y, etc.): t → g h → s m → n y → b l → o → gsnbo (no)
Given the constraints, my best guess is: It’s a puzzle where “g2410” indicates ; “kanwn” could be “known” (if ciphered), and “tabt” maybe “that”. thmyl tryf tabt kanwn g2410
But if it’s : thmyl → guzly tryf → gels tabt → gong kanwn → xnaja g2410 → t2410 Atbash (A=Z, B=Y, etc