Here are some answers:

uraabk1. Можете разъяснить функцию "AI Creatures+: Tier1-4"?

AI is not playing very well against creature mobs so each week the game gives the AI bonus creatures to compensate for losses. This shows the tiers of creatures it receives. The higher the difficulty the higher the tier of creatures it may get.

uraabk2. Может руда, а не дерево?

you should be correct but I am not sure if this file is not used for another thnig than town specialization. Better leave it as it is.

uraabk3. Разве там не должен быть написан "Threat level"?

Leave it as it is. I was told that text is based on the in-game sittuation so it is probably ok. Otherwise it is not a big deal.

uraabk4. Опечатка? "...lie beneath the still water", это постройка на земле, причем тут вода?

This building is found only in water in this mod.

uraabk5. Непонятно, название одно, внутри другое "Champion Charge" или "Acid breath"?

Original "Champion charge" was not working. Magnomagus did some fixes. I guess this is what he usses as ingame text for it. Leave it as it is.

uraabk6. Две Magic Guild в городе Preserve?

This is nival fault. Some of the stuff inside are huge mess. Trasnalate both. Not sure which one is used.