The pig, also known as swine or boar, is a highly adaptable and intelligent animal present all across the Fifth World. Some descend at least partly from formerly domesticated pigs gone feral after collapse, but many descend primarily from wild pigs. Feral pigs possess incredible intelligence, enormous size, and terrible strength.
People of the Fifth World frequently hunt pigs. They eat the pigs' meat, make clothing from their hides, make brushes from their hair, and make jewelry and other decorations from their tusks.
Some people who practice forms of Judaism or Islam will not hunt pigs, in accordance with their religious traditions. However, religions have changed in the Fifth World, become more animist and gone hyper-local, and so some who consider themselves Jews or Muslims may hunt and eat pigs with no knowledge of, or concern for, how their religion once forbade it.
A community specializing in relationship with pigs most likely lives as hunter-gatherers, roaming the forests and hunting wild pigs as one of several game animals they hunt. Due to pigs' ferocity, hunting them takes great skill, ingenuity, and courage. Hunters of wild pigs take their lives into their hands. As a result, such a community would likely honor feats of bravery. Perhaps they use a young hunter's first pig hunt as a coming-of-age ritual, painting the initiate in the stripes of a piglet until hen has successfully taken down a pig, at which point they ritually wash the stripes off. Perhaps they have legends about enormous, monstrous boar and the heroes who finally took them down. Regardless, they certainly respect the pigs' strength, cunning, and tenacity, and make sure never to take more pigs than the Keeper of the Game has told their wizard they may take.
A community specializing in relationship with pigs will likely hunt with spears, or bows and arrows, to maintain distance from the dangerous animal. They may have become proficient at tree-climbing, shooting pigs on the ground from tree branches up above. This sort of community likely climbs trees for many purposes, possibly even living in tree houses, with rope-bridges woven from living vines! Such a setup may include networks of hunting blinds and ropes connecting them so the hunter may race from tree to tree, following hen's quarry. This community might also have a relationship with coconuts (which require excellent climbing skills to harvest), or fellow tree-dwellers monkeys.
A community specializing in relationship with pigs may also forge an alliance with a local feral dog pack, hunting pigs together and splitting the meat between them. This alliance would help spread out the risk and make the hunt more effective. However, it takes sensitive negotiation, likely by the community's wizard, as the dogs may still remember how humans once used their domesticated ancestors for hunting -- as servants, not as equals. Once established, though, this bond can hearken back to the friendship both species' ancestors shared long before civilization.
To repay the pigs for their sacrifice, a community specializing in relationship with pigs may go so far as to create mud pits for them to wallow in, or leave scraps for them to eat. They would likely leave these offerings far from their camp or village, so pigs won't come too close, but they would hope that the pigs might find these gifts sufficient enough to offer themselves to the hunters in gratitude.
A community specializing in relationship with pigs may become known for the brushes (hair, paint, or makeup) they make from the pigs' hair. Such a community might place an emphasis on beauty and art, seeking out the best ingredients for paint and makeup to apply with these brushes, not to mention the finest oils for their hair. Inevitably, their art will honor the pigs that gave their life for it; they likely paint great murals celebrating the animals and their beauty.