a player of mine wanted to write up a book of grudges, but he does not have the advanced skill education. i'd not really thought about it before but are dwarfs raised in a karak literate?
i decided in this case that he was illiterate (mainly because there is another dwarf in the party who has education and i didn't want to diminish his skill choice).
the new dwarf is a miner, i decided that he knotted pebbles, stones and rocks into his beard to represent specific grudges. the bigger the transgression the heavier the stone. when the grudge is repaid the miner will unknot the stone and crush it or in the case of a defeated foe leave the stone in the hand, mouth or placed on the eyes of the unconscious or dead foe.