is it just me or are the explanations sometimes unclear ?(on the world/the way the abyss works etc)

Thuuduujn said:
The impression I've gotten from being in the made in abyss subreddit's discord server, where a number of the online translators at least used to discuss their work and may still do, was that the terms in the Japanese were often quite ambiguous, and relied on the visual context or later dialogue for clarification. The ambiguity you're feeling may be deliberate, in other words.

Spoilers for the most recent chapters of the manga from here on.

As an example, in chapter 63 (or I think it was that one), Faputa told the group that she could sense the approach of something like "layered beings". The 4chan group's quick translation translated this in such a way as to imply that Juusou (Beastmen/Narehate/Hollows outside the village of Ilblu) were made of multiple souls layered as one. Faputa was referring to the approaching Nishagora and Tepasté, layered on top of one another, as pointed out by a member of the more meticulous translation group Narehate scans (or perhaps by an assoicaye of theirs who happened to be in that discord server I mentioned, I really don't remember). This was likely all it was referring to, but the 4chan interpretation was reinforced in the same chapter when one of Srajo's group mentioned "Sherumena", a portmanteau of Sherumi and Menae's names. It would not be until the next chapter (or maybe the one after that?) that it would become clear that the two hadn't been merged into one being, but instead were two distinct characters. I still have no idea why anyone would refer collectively to the two of them as "Sherumena", except to imply that they had some sort of significant bond, which they did, being siblings before they were reincarnated in the abyss (or at least I think that's what happened to them).
The same chapter's release also saw some discussion of a translation discretion between "speeding time" and "hardening time", though perhaps I'm misremembering.