Most or all of it is made up.
They're not the kind of mistakes an MTL would make, because this is a deliberate rewrite by someone who never intended to create an accurate translation.
Oh also the main desc had a line that was kind of cringe (that wasn't shoehorned into either the Portuguese or Spanish descriptions 🤔🤔🤔), so I changed it to something a little different.
I would be surprised if Eleanor doesn't eventually return again.
She is the only other character with a last name (the other is Seruria Oliban), and has shown up in two 2-chapter arcs as well as the next omake, which is about their Sabbath.
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These were only done because I already had volume 4, and 'gender-neutral boku' was something to clear up.
I would rather bet on Anon+Varrel vol 5 than expect a redo of vols 1/2/3.