The Beanies' community is part of a technologically advanced society where women can rise to a position of power. The pursuit of knowledge not relevant to survival is permitted, and perhaps even encouraged. However the existence of the outer wall, guard house, and watch towers suggest that the Beanies are on guard against an external threat. Whether they are protecting the city from predators like the raptorcat or an invader is unknown.
Cuegan's interaction with the Beanies was limited to the original scouting/surveying party that they encountered at the top of the mountain and the Beanie leader, a woman who knows a bit of their language. Several other people were seen as Cuegan passed through the Beanie city.
for more information, see BeanishThe Beanish language is an artificial language created by Randall Munroe, referred to commonly as Beanish. When spoken in the comic, dialogue appears as a series of glyphs accented with diacritics (possibly to denote emphasis or formal-ness.). Few of these glyphs are found in any language outside the OTC. The beanies aside from the leader find Cuegan's language equally incomprehensible and even the leader herself claims that it was very difficult to learn.