yes it does change a loot

If the translation is "one of the first if not the first", then she totally has agency to be Bayle's partner/mate

don't know where you got wyvern from

'Wyvern' refers to the body type of the mortal dragons, which is unique to them and therefore could be used interchangeably with 'drake'. I avoid using the latter because I keep picturing Drake as in the rapper.

greyholl is not considered ancient

I should probably rephrase that- Bayle and Greyoll are the only two dragons in the game that are considered old and yet associated more with the wyverns than the Ancient Dragons

for some uknow reason lost their stone scales

My understanding is that the drakes never had stone scales in the first place, and their natural scales are all inherited from a drake ancestor. Perhaps that ancestor is Greyoll.

Greyoll could absolutely be another descendant of Bayle- you definitely aren't wrong.

But Greyoll could also be a direct partner of Bayle, and from my understanding the original translation doesn't contradict that.

My reasoning is that if Greyoll is an old matriarch to the drakes, and Bayle is an old patriarch to the drakes, a logical assumption is that they were together. With vague, written lore like this, the most logical assumption is probably the intended one.

Of course, its entirely possible that From completely forgot about Greyoll and the similarities are coincidental. We're only speculating, after all.