Intelligence isn't among their strengths, but grong's do possess a simple language that is comprised of more than merely simple grunts. In fact, being mostly nomadic, several grong tribes have developed dialects of the common, grong tongue. A few of the larger tribes that have kept their wanderings to tighter regions even enjoy some level of trade with some of the more fringe communities of men, learning and adopting bits of their language to help ease transactions.
Grongs are typically not war loving. Their weapons consist of sticks sharpened by rocks for hunting, and heavy clubs carved out of tree limbs for swinging at threats. The clubs are mainly to protect themselves against warriors from the larger cities of men that will kill grongs on sight to protect the crops and livestock of their cities. Grongs, of course, will eat either of those things during the colder months when Ouloos becomes less generous with her bounty. This has caused a mutual hatred and distrust between grongs and men from the great cities. A fact that makes grong tribes easily persuaded to assist any group with a desire to bring war to the greatest cities of men. A tribe of grongs doesn't pose any real threat to a heavily armed and expertly trained army like that of Havenstahl. However, several tribes of grongs working in concert with giants or trogmortem can quickly become a force to be reckoned with.