On a completely related note, it seems we have more evidence of Hydaelyn lying to us than the Ascians. Specifically when WoTM is telling us about the Sundering, she says that she and Zodiark existed together in the aetherial sea "before life". But if they were both summoned as primals by another civilization, that can't be true, unless she considers 'life' as it exists in current time to be different from 'life' as it was back then.
Of course I do not have any translations for how the other languages treated this revelation, so it might have been put differently there.
Or she might be doing some other mental gymnastics to say she and Zodiark existed before life, who knows.