Im running a Rogue Trader. General expanse wandering.
My PC's ship had become infested with grots and snotlings. The grots formed two competing tribes, one taking residence in the air ducts near the engine room, the other the waste processors on the lower deck.
Because of their locales, the tribes had each adopted different "phelosupies". One had diverged into a "tru-grot" tribe utilizing basic tools and organic weapons like Squigs, poison etc.
The other had started mimicking the "fast ones" near the engine room and formed a (primitive) high tech society led by the "littlest mechboy".
My players would came to love the grot mechboy and his mimicry of the tech priests with an affection that surprised me.