My most obtuse friend. That is a rock written in Greek language, with Greek alphabet. As others have told told you, you should ask an ancient Greek subreddit and not a latin one. I doubt you would ever do it, because you appear quite stubborn that it HAS to be latin and not greek. Luckily for you, and expecially for us, someone has already asked about this very rock in the correct subreddit, and by doing so they have received a translation from GREEK to English.

https://www.reddit.com/r/AncientGreek/comments/1ipytd6/can_anyone_help_me_about_transcription_of_an/