نص أصلي - روسيّ - Я буду спать, но I никогда больше не проснется

What did you change here, Francky? This is not Greek. The alphabet is Cyrillic, but I don't know whether it's Russian, Bulgarian, Serbian, Ukrainian, or what.

This is definitely Russian, though I would not say that grammatically translation is 100% correct. Also can not make any correction as my Greek is at zero level

It's not a translation - it's the original text. I've changed the source language to Russian.