- If you are lost in the dungeon, try to draw a map. It's not that big. The location is displayed in the upper left (e.g. A1 or F6). Simply draw a 6x6 grind and mark where you find what and where walls are (arrows not available on the compass)
- Talk to everyone, you can save before dialogue choices. Do so. Try each choice and see what happens, pick the one you like most
- If you get stuck, you probably can talk to someone about your problem (Discuss people) you haven't thought of
- Translation is at the beginning utter gibberish, you'll get used to it and it even develops its own charm
- You need to buy protection from the guard to enter the dungeon. When you reached level 2 you can buy the cheapest protection, go to the fountain, drink and explore from there. If you mine at night, leave the dungeons before passing out and you can still do something in the castle (by returning from the city). If you need to meet someone there it is possible to enter the dungeon with the cheapest amulet, go directly to the fountain and drink, talk to the person (you can walk back from level 2) and do some mining before passing out

So, some update:
-When you meet the nun, you can still collect the holy papers. Just click on the star button that is otherwise used for switching between location or person selection
-Don't get confused by location/person selection. In the tower room it's always back to the fireplace room as default, where at the fireplace it's always talk to people as default. I always fall for this and move back to the fireplace trying to speak to Violet

Now severe spoiler:
-When you get the task to deliver a pendant to the husband and you meet the woman because he's missing, the best way is: announce to go return to the quest giver (don't accept her request), then next agree to her proposal. Go meet the loan shark, get Fedor out. You can either ask for a favor (go see the girl) or release him immediately, in both cases you'll meet the girl the next time you use the pendant. Have pity with her (don't threaten) and you can see her again. I don't know what this is good for though, it seems just to pass time.

Just visit her at night.

Dungeon Level 1

0ABCDEF
1***C..
2****..
3E*.***
4**.*.*
5.G***L
6..G***

Dungeon Level 2

0UXY
1C*L
2.F*
3.DS

* - empty
. - walls
E - entrance, skeleton (15 gold, but may have some hidden effect)
G - gold mine (8 gold per digging)
C - crystal mine (random gem)
L - level
F - fountain (drink)
S - surface (city with new locations)
D - dark forces (Ziggurat)

Protection 30 - 12 moves (+42 gold from digging in mine)
Protection 50 - 16 moves (+54 gold from digging in mine)
Protection 100 - 20 moves (+28 gold from digging in mine)

Don't take anything from the skeleton during the first entrance to the dungeons.

Here is a map of lvl 1 of the dungeon:


And here is the map to lvl 2. I think it changed in the last patch, but it's still useful.

Scrolls (might be random, because guide on steam shows different gems, but also diamonds are missing due to possible bug)

Kertsin (coal, coal) - unknown
Imi (topaz, brilliance) - protection from aura of madness in catacombs
Rkuezh (coal, rubin) - increases curse
Zull (chrysolite, rubin) - protection from undead and spirits
Int (amethyst, chrysolite) - current stats
Kroll (topaz, topaz) - neutralizes poison
Reishal (emerald, emerald) - copy what is seen
Urdal (rubin, brillance) - dispels curses and other enchantments from people and places
Eull (chrysolite, chrysolite) - increases princess reputation
Remor Strong (topaz, emerald) - better understanding of people, especially when searching for criminals
Isar Weak (amethyst, brilliance) - weakens creatures who attack seal of beryl
Ruan Strong (amethyst, topaz) - reinforces seal of beryl
Ruan (coal, chrysolite) - reinforces seal of beryl
Ruan Weak (chrysolite, emerald) - reinforces seal of beryl
Remor (brilliance, brilliance) - better understanding of people, especially when searching for criminals
Remor Weak (coal, emerald) - better understanding of people, especially when searching for criminals
Isar Strong (rubin, emerald) - weakens creatures who attack seal of beryl
Isar (coral, brilliance) - weakens creatures who attack seal of beryl
Stirnoll (brilliance, emerald) - unknown
Meinur (chrysolite, brilliance) - reduces seal of beryl
Faruh (rubin, rubin) - 50 coins
Urgadal (coal, amethyst) - unknown
Ruhol (topaz, rubin) - illusive aura that is hardly identified by priests
Tilt (amethyst, emerald) - restores body of someone who survived possession
Loguhm (amethyst, rubin) - decreases curse of object or live person
Ostef (amethyst, amethyst) - unknown
Avju Strong (coal, topaz) - decreases princess reputation

Every new game recepies for the scrolls are different!
The same scroll requires different components if you start the new game.

The Name of the each scroll is always connected to it's features, no matter if you start the new game or play the old one.