House Rules

Game Master Axe of Nope
The Gm Axe of Nope is unsheathed whenever the players attempt to do something that is deemed ridiculously implausible. Even if a certain action, such as attempting to catch a falling horse with silk rope, is deemed technically possible in D&D physics IT CAN'T BE DONE IF REAL PEOPLE IN THE REAL WORLD COULDN'T DO IT!!! (Normal game mechanics like facing don't count.)

Combat Actions
If a player decides to do something in a combat round more sophisticated than an attack (i.e. push a large pile of rocks onto the enemy, swing on a rope and attack indiana jones style, etc.) and isn't exactly sure how that is done in the context of D&D physics, the GM will house rule it. The player will NOT stop the entire combat to spend 15 minutes arguing about it (by which time JD will have fallen asleep). ON THE OTHER HAND if the player has looked up the mechanics before his turn and has it already to go, he may proceed.

Taking up time looking up rules seems to happen in extreme novices and hardcore experienced players. In the former it is understandable, in the latter it is infuriating. So 30 second rule. I wear a watch and God dammit I'll use it.

Describing Combat
It's not really a requirement, but I encourage everyone to describe their actions in combat. One suggestion I've seen is to wait until AFTER the dice are rolled and you know whether you've hit or missed and whether it was a killing blow before describing your attack, this way you won't be building up for a dramatic attack only to head straight to wiff city.

Ex.

JD: "Okay, does a 21 hit?"

Connor: "Yeah, a 21 hits."

JD: "18 damage. Is this a killing blow?"

Connor: "Ayuh."

JD: "Okay. Ser Ious spurs on Super and barrels full boar into the Orc. His lance enters the orcs chest."

Connor: "Blood spurts from the Orcs mouth. You use your foot to slide him off of your lance."

Elf Ages
Elves don't live nearly as long as they do in normal Pathfinder. Their average lifespan has been reduced to about the same (maybe a bit less) as Humans, though Elves are much less prone to sickness throughout their lives. Ditto with Half-Elves.

Languages
Common is NOT a language.

Tarquinians speak Tarquin-Elven a branch of Elven.

Spearwalders speak a branch of Nordic.

Alfordians and Harklanders speak Alford, the most common Human language.

Donetzians speak a mixture of Alfordian and Tarquin-Elven.

Dwarves speak Dwarven.

Hinterlands Dwarves spoke Old Planes Dwarven (c. 500-1000) and then High Planes Dwarven (c. 1000-1542)

Leprechauns (yes, those are a thing) speak a language that shares some Gaelic roots with the Harkland branch of Alfordian.