One of the things that I really liked about Forgotten Realms for Dungeons and Dragons 3.0/3.5 was the "Regional Feats." With a single trait you could give your otherwise two-dimensional character real depth. One of the many things I'm seeking to emulate in my Dungeon Fantasy campaign setting, Sicatra, are some of my favorite things from DnD. Regional feats are but a step in the road toward that end. Like a lot of "social" traits in Dungeon Fantasy, Cultural Familiarities are kind of glossed over. The bard gets Cultural Adaptability and Cultural Familiarity and...that's it (excluding "free form adventurers" who use no template). GMs may allow the following, optional lens for all adventurers in his campaign.
Cosmopolitan City: Your character is from a massive fantasy-style city (e.g., Lankhmar). You may spend any of your template's points or points from quirks on the following traits: Cultural Familiarity (any) [1/culture], Jack of All Trades 1 , Language (any spoken within the city) [2-6/language], Piecemeal Knowledge (this may be taken at most twice) , and Street-Smart 1-3 [5/level].You may also learn Area Knowledge (city your from or nearby areas), Merchant, Panhandling, Streetwise, and Urban Survival if those skills are normally not available to you.