Are you perhaps trying to distinguish between external and internal logic?

External logic is what concerns the creators of the game (Square) and the players (us).

Internal logic is what concerns the characters who are (presumably) unaware that they are in a story.

We have been discussing the external logic behind the text: why the game makers put in the Greek letters in this way.

If you are trying to suggest that it has meaning internally, that may well be true, unless Dollet puts random Greek letters on their communication equipment. It could be like a serial number or something.

But the consensus seems to be it has no greater meaning externally. And the partial matches have not been persuasive.