Firbolgs might have traditions centered around nature worship, forest guardianship, and the preservation of ancient wisdom. Their customs could involve rituals to commune with spirits, ceremonies to honor the changing seasons, and festivals celebrating the bounty of the earth.
Firbolgs might speak a language rooted in the natural world, with words and phrases inspired by the sounds of the forest. They might also have secret languages or dialects known only to their kind.
Firbolgs might express their connection to nature through music, dance, and storytelling. They might create art using natural materials found in the forest, such as wood, leaves, and stones.