1. What do the Paz do to ensure high levels of hygiene (if they do any practices at all)? That is, how's their sanitation?
Pazmat has more than few rivers infused with magic, keeping them clean, so that was what most of them bathed with. Of course, the truly affluent could afford to live on villages right next to these rivers, allowing them to bathe everyday in them. The richest of the rich were able to buy soap from Satkicz, when they weren't violently slaughtering the indigenous peoples there and raping their land, that is.
Those less-fortunate would have to wait for shipments from these rivers, which would be diluted due to being separated from the source. The farther your lived, the more the water had to travel, meaning the less pure it was. This still shows in the modern-day language with idioms like "X lives so from a river" for "X doesn't bathe very well".
Nowadays, though, modern-day plumbing and the development of hygiene products for all social classes such as soap has basically allowed all to
Where do newlyweds live?
Newlyweds live the first year of their lives in their local Qedhagjat (if it is full they will move to the closest one in the country that has a free room). There they live as if it was an apartment, using the Qedhagjat daily for spiritual purposes.
What sorts of houses do the Paz have?
I haven't decided yet, but if you twisted my arm, I'd say that due to living mostly in grasslands and hilly plains, that they would have a housing style similar to 1500s-1600 western Europe.
What is Paz linguistics like?
Not sure what the question is, but the Paz have always been highly interested in linguistics due to the massive dialect continuum that exists in their native language. As such, it is considered a highly prestigious field of study, especially since Pazmat has hundreds of minority languages from conquered peoples.
Are the Paz matrilineal, Patrilineal, or something else?
What sorts of diseases do the Paz have?
Most of the us boring Terrans have, but there are few others, mostly of which adversely affect spiritual purity. Those particular ones are inadvertently caused by demons in Gehenna.
What sorts of taboos or superstitions do the Paz have? Are there any particular reasons for these?
It's a common street belief that eating the leaves of a plant called Tacwat
, a plant with spiny, purple leaves, will curse your lover to have terrible luck. This is mainly due to a previous emperor who loved the taste of Tacwat, but the hallucinogenic effects accidently made him kill his wife. Rather than take the blame for it, he said that she was cursed due to him eating it. Today, it's a common, but illegal drug.
Another superstition requires a bit of explanation. Traditional Paz male upper-body clothing is a sort of belt that is worn across the chest, starting from one shoulder and going diagonally down to the opposite hip. This sash is called a "Owutcalb", literally "Chest-ring", and usually has writing going down it. The "standard" direction is to start at the left shoulder and go down to the right hip. Starting at the RIGHT shoulder and going to the left hip is considered seriously bad juju, mainly because Owtucalbs used to almost always have "Genczjivo" ("We (as in the Paz in general) will prosper"). In Old Pazmat script, if the Owutcalb is positioned on the right shoulder, then it looks more like "Zarivgzjivo" ("We will suffer defeat").
There is no reason for this superstition to even exist anymore, given how the New Pazmat script doesn't have this little "feature" anymore, but people still hold onto with sayings like "[X] is such a right shoulder" for "X seems like a distrustful person" and "Is your Owutcalb on right?" for "Are you sure you can do this?".
Owutcalbs aren't even worn anymore, except for festivals, anyway...
Sorry for not answering all of your questions, but I'd like to think about them some more. I answered what I could.