Hobgoblins might have a strictly military culture valuing discipline, honor, and obedience. Their traditions could revolve around training warriors, defending the tribe, and conquering new territories.
Hobgoblins might use a formal and precise language optimized for military communication and orders. They might also use special sign languages or drum signals to communicate on the battlefield.
Hobgoblins might organize combat games, archery contests, or ritual dances as entertainment and to strengthen the community.