Ah, well... shouldn't report bugs from that one. It's unsupported. Although this time you found a problem with dialogue.
I made a new FF7 installation using the latest reunion, just to test out the issue with Cid's dialogue during the retrieval of the huge materia (field rcktin4) This is the issue:
{CID}
“{CLOUD},you know
how to use this,right?”{NEW}
press Π,µ,Σ,or ∂.”{NEW}
or ∂.”{NEW}
“If you punch in the right code,
the lock’ll be released and
you can grab the materia.”
As you see after the second {NEW} Cid just reiterates the last part of what he said right before so it looks to me that either the "or ∂" after the {NEW} should be removed or, it should be taken off the first sentence. Though, due to the window size it looks fairly awkward to have that single button appear in its own window. I can't recall as it has been ages since I played the game with the original translation, but perhaps that was a leftover from the original pc port, due to the button prompts name taking a lot of space thus requiring the last prompt to have its own window?
Second thing I've noticed as I approach the end game is something that happens in field las4_0 at the bottom of the northern crater where your party reconnects after being split into two at the earlier fork. If you end up sending Tifa to the right, once reconnecting, she'll give you a Mystile/Mystère armor however, the game has always been reporting that incorrectly with the message "Received Key Item Mythril".
I've noticed however that such a behaviour is kept in Reunion where, upon getting the item from Tifa, the message will still say "Obtained Key Item Mythril !" Not sure if this was left there intentionally or not, but since I've seen no mention of it in the bugtracker I am pointing it out again.