To be honest, I wish more criminal-types would be a little more... creative.    The hood thing bothers me, since it's extended to the point of ridiculousness: if a character is standing right in front of a hooded criminal, they dang well should be able to see their face, unless the criminal has some kind of face veil on in addition.   A hood that creates sufficient shadow to actually hide your face also almost certainly makes it really freaking hard to see more than five inches in front of you - and forget any and all thoughts of peripheral vision!   

I'll roll with the convention since everyone else does, but it still completely weirds me out.

Yes, and the language they're really speaking clearly has distinct terms for "hand" and "paw", as many RL languages do 

I'm pretty sure the devs just didn't think about it, but to lampshade it anyway: maybe gold just tastes good?   Humans eat quite a few tasty things we either can't digest at all or (more often) can't digest well.   Maybe gold is the Kran equivalent of sweet corn.

This really bugs me: why are so many of the race names apparently singular and plural?   Why isn't it Xachan/Xacha, Enki/Enkidukai, Klyri/Klyros, etc.?   

Also really bugs me: why is it "the Laanx religion" rather than Laanxism or something else that's a useful name?   Same with the worship of Talad and Dakkru.   I've seen Xiosian, but I have no idea if that's officially correct or just player-made.

I don't think it is mundane. You are asking questions that will eventually enrich the settings of each race when 1.0 eventually makes it debut.

I don't mean that it's mundane in the sense of "unimportant", but mundane in the sense of "things that would be part of our characters' everyday lives", vs. something like, say, the secret history of the Klyros.

On gender dominations, not all animals are male-dominant like humans are. Iguanas and hyenas are female dominant; as if they somehow became sentient races with civilization the males would be the ones staying at home cooking and cleaning while the females would be off hunting or acting territorial. There are also a few species that don't have a dominant gender, wombats was it? Annoyingly enough, although Yliakan races are many, they are not diverse in this regard; it seems like however they differ physically they otherwise act just like humans.

I would imagine many players play their characters as basically funny lookin' humans because that's the type of psychology and social behavior they're familiar with.  It's difficult to find out much about any of the Yliakan races as it stands, and requires a lot of guesswork.

For example: if you cared to, you could extrapolate from the existence of the Ynnwn, and what we're told about their psychology, (that they don't feel inferior for their half-breed status), that: 1) Diaboli, Dermorian and Nolthrir are all very accepting of mixed-race pairings, 2) Diaboli, Dermorian and Nolthrir families would normally not make a little Ynnwn child in their midst feel like an outcast, and 3) Dermorian and Nolthrir families and societies are structured in a way that having a lover or spouse with a much shorter lifespan isn't going to be considered a major problem.   And from #3 you could theorize that because of their long lifespans, Dermorians and Nolthrir really don't consider it a big deal to have many partners over the course of your life.  That in turn would imply a bunch of other things about them, including social structures that are either matriarchal or egalitarian, because you'd have many women with children from multiple fathers, which brings the problems in a patriarchy.   

But that's an annoying amount of guesswork to have to do.   Frankly it would be nicer if there was even a very slapdash listing somewhere of Here's What We're Thinking In Terms of Everyday Theme Stuff Right Now, This May All Change By 1.0, But Just In Case You're Curious Here You Go (TM). 

One way to make Nolthrir underwater speech work is to have it be similar to how whales and dolphins communicate.   Cetaceans push air through their equivalent of a nasal cavity, which they can control, (like we can control the larynx), to produce sounds which then go out through their blowholes.   Nolthrir could have a similar setup, with the sound produced by air from their gills going through a specialized nasal cavity, then out their nostrils.   IIRC the book about music in-game implies that Nolthrir music is whalesongesque, so that would be consistent.   

It would also mean their language would be hard for any other species to speak, though.  So that could raise some theme issues