My opinion: The elemental icons at the bottom are fine, but the hex icons on the top right are too confusing. At the very least, they need to be small enough that they can line up directly next to their numerical values. Ideally, they should also have the standard STR, INT, CON, etc. abbreviations next to them, but if the goal is to try to cut down on translation costs, maybe a compromise would be to give them (and the numeric values) roll-over text with the common English stat abbreviations, which just about anybody who has ever played a RPG is probably going to recognize, even if English isn't their primary language.
I also have to say, thanks for tweaking the containers so that they stay open when you select them so it's easier to drag items in and out, but we still need the chest inventory tweaked so that it will
show if a weapon/spell scroll is usable, while it's in the container. After all, you don't forget whether or not you can use a mace just because it's in a bag. Even better, would be if it did this while showing the Party Inventory and Floor Items as well.
Additionally, Spell scroll management also needs to be tweaked since the inventory UI doesn't distinguish between spells you can
eventually learn (because it's currently too high a level for you) and spells you can cast from, but will never be able to learn. (Meaning that you should probably sell it or pass it to another character unless it's so valuable that it's worth taking up an entire inventory slot for a one-off hail-mary throw.)
Most of this confusion here could be eliminated if
spells that you can eventually learn, but don't have the correct level for yet, were simply marked with a greyed out "Learn." (see example below)
Ideally, right-clicking on a spell scroll should also show more useful information in the Item Details section, like the spell's base level, what classes can learn from the scroll, which classes can cast from the scroll, the spell's domain (ex: Evocation) and the descriptive text that you would normally see on the help page for that spell (or a link to that spell in the help screen). However, if this can't be done due to the way items are handled (where somehow the spell scroll description can't be changed to reflect individual items) then at the very least, the spell scroll name field should be appended to include the spell class(es) and base level so we don't have to guess.
Personally, I would suggest rejigging the inventory screen, and
relocating the range weapon/range ammo slots, and Fire, Cold, Shock, Acid, Sonic resistances so that bag/chest row(s) can be displayed as a permanent 3rd row, and won't automatically close as soon as you drag an item out of them.
If you have multiple bags/chests, it should either toggle views when you click on another container item, or turn into a scroll window to allow as many rows as you have bags. This would be ideal, since it would allow you to transfer items directly between containers without having to drop to the floor or go: bag, inventory, inventory, other bag for every item you want to move.
Here's a photoshopped version of how I think the inventory screen
should look: