Assume like DnD where information is not provided.
Free races (aka main player races)
Gnrolls
Biome: Desert
Favored class: Cleric
Stat adjustments +2 wisdom, +1 con, +1 str -4 char
Average size: 6'5" 228 pounds
Hyena like in appearance.
Gnrolls value friends and family above all else;
they value principles, ethics, religion and customs second;
they values themselves third;
anyone or anything not covered by those three is a very distant fourth, often given outsides the impression they have no morals.
Gnrolls females have no outward secondary sex characteristics when not pregnant or nursing, and both of those are done in private. Gnrolls have no gender. Children are raised with the help of the friends and family of the mother, with no acknowledgment of paternity.
Gnrolls struggle with loose social structures, but none-the-less feel compelled to seek out new friends and acquaintances when familiar ones are not available.
Orcs
Biome: Temperate mountains
Favored class: Fighter
Orcs take joy in their adversity. If labor and war are parts of life, than the orc seeks enjoyment in them, or at least stoic acceptance. They are contradictorily always at war with everyone, while at peace with themselves (individually, they fight among themselves)
While known for their love of war, they are probably the most restrained in their practice, taking great care to avoid civilian casualties and property damage.
Humans and elves scoff at the informality of their martial training, but they learn, practice, and teach, all to great affect.
Ogres Extinct (see history)
Biome: Frigid mountains
Goblins
Biome: Badlands
Goblins are known for their complicated and shifting political structures. For every great goblin leader, there are ten potential leaders. While many goblin leaders are conniving, the common goblins' suspicions mercuriality keep them under check
Fashren
Biome: Unknown extraplanar location (natural), migratory and transient (actual)
Favored class: Wizard
Stat adjustments: -2 con, -1 dex,-1 wis,+4 int
Average lifespan:56 years.
The Fashren have translucent, pastel colored flesh (all hues, but yellow is most common) with a pattern of dark splotches the opposite hue in their eyes. All Fashren have female secondary sex characteristics. Nursing is split between the mother and her close friends and family (for example: brothers).
They cover the vast majority of their skin, as they are poorly suited to all biomes without them. In all climes their clothing comes is in all varieties of loose, tight, flamboyant, and modest. Usually a few runes are included to add protection from the elements, as well as a great deal of rune-looking designs.
The Fashren hold no emotional attachments to places, and eventually the places they've yet to see and the friends they've yet to meet will win out over staying where they are. Many travel continuously or seasonally.
They are curious about all things and love to debate (but seldom do they argue).
Despite their extraplanar origin, only exceptional few have direct involvements with other planes. Hover a great many can do small feats or arcane magic.
The Fashren have a huge number of genders that have no correlation to one's sex. They adopt gender norms from all of the cultures they encounter, and mix and adjust they to create as many new genders.
Dominion races
Humans (extinct, see history)
Biomes: Savanna (natural). Until recently, also majorly present in grasslands, mountains, jungles and temperate mountains.
Halflings
Biome: Grasssland
Favored class:Rogue
THey loved comfort and care little for wealth, strongly favoring to lead unremarkable lives and avoid larger conflicts in the world (and conflicts in general). The recent collapse of the social order around them (see history) has made that impossible and seeking security now often means going out and dealing with the greater world first hand.
Elves (high)
Biome: Forest
Favored class: ranger.
Lifespan: 750 max, old age deaths rare.
High elves have dark complexions from their exposure to the sun.
Elves love peace and freedom above all. However, they can be very pragmatic in pursuit of peace and they often really just love thier own freedom.
They practice a complicated mixed use type of agriculture that involves dozens of types of plants growing in a controlled area, given the uninitiated the impression these areas are wild. As with their gardens, so with their society: they don't present any clear leaders or social order, but they act in unison when the need arises.
They control their birth rates as a check on the fecundity their long loves allow. An individual elf will often go through multiple professions in their life. Marriage is seen as temporary, only lasting about 60 years on average.
They have highly trained solders, but know that their population can't manage losses as well as the shorter lived races.
They hold no malice and little respect for the "lesser" races, deeming it ridiculous to judge them by elven standards. By contrast, they do hold low elves to their standards, and hate them for failing to live up to them.
Barcaypa
Biome: Jungle
Favored class: Bard
Stat adjustments -1 str, +1 dex, - 2wis, +2 cha
Average size: 5'2" 142 pounds.
Average lifespan: 98 years
Capybara like appearance.
The Barcaypa are split into a great many cultures and sub-cultures intertwined and blending into each other in ways that are very confusing to outsiders.
They are peaceful and welcoming by nature, but jungle fauna and recent history have forced them to learn to have something of an edge.
Barcaypa are known for telling and thinking in stories (including complicated and nuanced ones).
Between extra digestive organs and food processing techniques, the Barcaypa are able to consume more types of plant matter than most sapients. This results in denser populations, little time spent growing food, more time spent processing it, and complex diets.
Oceanic
LizardFolk
Biome: Small islands on deep ocean (natural), saltwater marshes and small terrestrial islands (aquired)
The Lizardfolk are the natural seafarers and the only ones able to reliably cross the deep oceans. They can swim for days at a time, but sail when they need to travel great distances or carry cargo.
Their strong constitutions, low metabolisms, and ability to drink saltwater allow them to comfortably endure trips that would kill most terrestrials.
They established a number of small colonies on remote islands, river deltas, and major ports.
Underworld
Dwarfs
Biome: Elevated stone (i.e. under mountains)
Before a dwarf can be born, the space they occupy must first have been carved from the rock. As with the space they occupy, so our most other aspects of a dwarf's existence prepared for them. They have a sophisticated infrastructure, which they cannot survive without. They are the only sapient race to be created with tools.
A dwarf's full name includes their given name, a name chosen on adulthood, a materinial name, and paterlinial name, their nationality, and their profession.
Dwarf maidens are know to braid their beards and decorate them with ribbons. (There's no larger significance to that, I just find it an amusing mental picture).
Minotaurs
Biome: Undergrowth (natural), small numbers present through locations of human civilization (see history)
Elves (low)
Biome: Undergrowth (acquired)
The exact same species as high elves. Grotesquely pale due growing up without sunlight.
They consider that life is not a right, only an opportunity for life; and that those living must justify occupying space that might be occupied by new life. They breed very quickly for elves, and few live to see old age. They enslave other races as well as the weaker members of their own race.
The only masculine occupations are fighting, hunting, catching/managing slaves, and entertaining. The only feminine occupations are leadership, skilled crafts, and proprietorship. (slaves are not considered real men or women and are often castrated).
Kobolds
Biome: Brimstone.
Overworld
Loci (extinct, see history)
Biome: Evanescent nimbus, larva stage in Savanna
Bodies like locusts, faces like mens', hair like women's, horns shaped like crowns, and tails like scorpions.
Every 21 years, they go through extreme population growth and devastate their biome (which is part of it's natural cycle). The population then mostly eats or spreads to other biomes (much to their inhabitants dismay).
They become intelligent at about the same age as other species, but reach their full size and reproductive capability much younger.
Casfae
Biome: Temporal stratus
Preferred class: Sorcerer
Size: tiny
Stat adjustments: -4 str, -4 con,+2 dex, +1 wis, +1 int, +4 cha, +2 fort save
Special abilities: flight.
Largely pacifistic: diplomacy first, and trickery second.
Venom lands
Houyhnhnms
Horse like appearance with coats appearing in all colors. They typically style both the hair on their heads as well as their tails.
As skilled in magic as they are in friendship.