All characters know how to speak Common.
Dwarven base speed is 20 feet. Dwarves can see in the dark up to 60 feet. Darkvision is black and white only, but it is otherwise like normal sight, and dwarves can function just fine with no light at all. Something that isn't stone but that is disguised as stone also counts as unusual stonework. A dwarf who merely comes within 10 feet of unusual stonework can make a check as if he were actively searching, and a dwarf can use the Search skill to find stonework traps as a rogue can.