While humanity is the dominant race on Mithra they certainly aren't the only ones.
There are the Elves whose natural lives can last two millennia. In the past, they stood equal to humanity ruling over strong and prosperous nations the largest of which being the Kingdom of Polletus which resided on the Western Continent of Galindia. Polletus was destroyed after a series of large-scale human revolts. which drove most of the elves of the west to seek a new home on the northern continent. Today, however, the elves are a but a shadow of their former selves. The elves of Polletus who ventured north were later invaded and enslaved by the Bothnians whom I will discuss later. The majority of the elves who still remain in Galindia live in the northeastern part of the continent in the Eclenian province of Haragladia where they live in relative peace.
The elves of the east, on the other hand, have never had their own kingdom but have instead lived side by side their human counterparts living, loving, fighting, and dying as equals.
Then there are the Dwarves the children of stone and metal, though of short stature they are usually stronger than the average human and elf. Gifted miners and smiths, nobility across the globe that can afford it take deep pride in their ownership of dwarven jewelry and will happily boast about it to their rivals. But for all their skills, intelligence, and curiosity the Dwarves are also known to be narrow-minded often writing off prototypes of revolutionary technology as unimportant, shunning those of their kin who pursue such foolish things.
Most of the Dwarves reside in the State of Rhiannon on the northern continent.
Finally, there are the Mendier. In ancient Myth Mendier are considered hybrids of humans and animals. They typically have animal features such as animal ears, tails, and sometimes claws. They have heightened senses compared to humans and have a strong connection with nature. However, they live for half or less than half the amount of time as humans.
One thing you must understand is that the Mendier are not one race, as far as we know there are three races of Mendier.
Wolfkin
Spoiler
The Wolfkin, living no longer than 45 years the Wolfkin are considered to be among the strongest intelligent creatures on Mithra. They share characteristics with wolves having wolf like ears, tails, and sharper more carnivorous type teeth. They stand at a hulking muscular average of 200cm tall with some reaching as tall as 250cm. What the Wolfkin lack, however, is a deep intellect and patience, maturing only to about the point of an irritable human teenager. Conversation with Wolfkin is juvenile at best and remember how I said that they're irritable, yes say one thing that even slightly offends them, I guarantee you won't leave that situation without at least a broken bone. Wolfkin are at their best when they're eating, fighting, hunting, or if it's the time of year, finding and screwing as many of the opposite sex as possible, that doesn't bar members of the other races I should mention, though there have only been known successful hybrids of Wolfkin with humans, and that goes for all Mendier. But due to the rather control lacking nature caused by the hormones of females in heat, Wolfkin usually go to designated places away from the rest of society just prior to the beginning of mating season to avoid any incidents.
Due to their limited intelligence Wolfkin are a bit limited in careers they can take up, most go into either unskilled physically demanding labour work or something where they can put their fighting skills to use, they make damn good shock troopers with the right teachers.
Felesons
Spoiler
Then there are the Felesons, sharing characteristics with cats including ears, a tail and a common trait of aloofness. The longest living of all the Mendier races with an average span of 50 years with an increasing number living as long as humans. Felesons are actually known for having the highest success rate of cross-breeding with humans which helps to increase their lifespans, and because of that longer lifespan, they are also the most intelligent of the Mendier races. They often take up careers in fields such as medicine, politics, and teaching. Like the Wolfkin though the Felesons have a mating season which can be rather intense, but Felesons usually have enough self-control that they don't have to worry about committing rape in the middle of the street however that said, female Felesons especially will usually take a couple of weeks off of work.
Lepesons
Spoiler
Finally there are the Lepesons, probably the saddest of the Mendier races, the Lepesons live no longer than 30 years and share characteristics with rabbits such as ears and a tail. They're also usually very timid and submissive, oh and they practically clone themselves in a short amount of time, the length of pregnancy for a Lepeson is 3 months and a Doe will give birth to an average of 6 kits, but this is somewhat balanced out by the fact that 3 in 12 Lepeson mothers will die giving birth and usually most if not all kits will be lost as well. Lepesons are less intelligent than Wolfkin, with a mental maturity akin to a human child, they know how to feed themselves and their young, they have a deep set paternal and maternal instinct, they can mate whenever they want (much like humans) and free Lepesons will usually spawn litters based on food availability.
However there are very few free Lepesons in the world, this is partially because they have become incredibly dependent on humans to survive, but that's not really voluntary in most of the places where you find Lepesons (The largest populations of them residing in Burjion on the continent of Galindia, Soeria also on Galindia, and all over Nan Fang and Aspya on the eastern continent.) In most of the countries, I listed Lepesons were at one point or are currently enslaved, or live in a condition that is similar to it. In Soeria, Nan Fang, and Aspya most Lepesons live in rural communities working mostly as farmers as serfs.
In Burjion they have many Lepesons live alongside the regular human serfs but the Burjionese are rather notorious because the government has state-owned mega farms which are worked solely by mass bred Lepesons, the living conditions of Lepesons in these mega farms are similar to the horror stories vegans tell you about when they try to get you to stop eating meat. Oh speaking of which, the average lifespan of a Lepeson in one of these mega farms is 25 years or less, since after a few years of being overworked Lepesons in these places are slaughtered and then butchered before the meat is sold at a discounted price to people all across Burjion. Lepesons who try to escape these places are hunted down and killed by the Burjionese Commissariat's Order Keepers who wear the ears and tails of Lepesons they've killed as trophies. If Lepesons aren't living "free" out in the rural countryside with other human serfs or in the hell of the State Mega Farms then they might be in one of the State run brood facilities where the Burjionese in times before war will mass produce Lepesons for the purpose of using them in military service. In the days before the advent of the firearms, these "troops" were purely used as meatshields or cannon fodder. armed with either nothing or a long sharpened wooden pole. After the advent of firearms, they were armed with the oldest most pile of junk firearm that was lying around and used for the same purposes. Lepesons, as I mentioned before, are very timid and if you can get them trained enough to charge in the direction of the enemy that's a pretty big accomplishment, if you can get them to use a rifle without dropping it and running away in fear that's a god damn miracle, as you can imagine the life expectancy of these "soldiers" is less than nothing should they do their job right. The best possible living condition for a Lepeson in Burjion is to be bought by a government official or local noble to be kept as a house pet, it should be noted that some of these owners partake in using their Lepesons as sex slaves, in secret of course considering it's illegal for humans to breed with Lepesons in Burjion.
There is actually one other intelligent race that lives on Mithra, that being the Dragons.
The most ancient and wise race in the world. Living for as long as 5,000 years by some accounts, today they are a rare sight as over the millenniums their population has slowly but surely decreased. Most dragons live solitary lives away from the human world. Some of them have over the centuries gone mad and been reduced to their primal instincts. Others have become great leaders and teachers to both others of their own kind and the other races. While Dragons live all over the world, the majority of them live on the southern continent of Albukana, where many live in the society of the Children of Jeddiam, and many others have been enslaved and turned to unintelligent animals by the humans of the Sarvanist State of Manat.
Finally I'd like to make a minor update to the religion post by adding the most recent religion we added.
The Children of Jeddiam more commonly known as Jeddites both worship dragons and are dragons. The Jeddites believe in Jeddiam the ancient dragon, who took in their ancestors when they were weak and hungry and treated these early humans with the same deep paternal love as he had his own children, they were treated all the same. Dragons and humans were as one. However some humans broke off from this peace, declaring the dragons inferior beings and the Jeddites disgraces to the human race leaving. These people formed the rest of humanity. Jeddiam was enraged at the humans for this, but still viewed those who stayed loyal to him and the dragons as his own, and so he told them that those who left must pay for their crimes, for they took his kindness and gave him only pain. The Loyal Children of Jeddiam then embarked on an eternal warpath against those who dared to defy him, but Jeddiam could not take seeing those whom he considered his children fight, and soon died of heartbreak. However he left behind a final wish that after he was gone that in his place one human and one dragon lead the Children of Jeddiam together.
Today the Jeddites have made peace with most of humanity, with one major exception. That being the Sarvanists. They who are descended from the first humans to leave and betray Jeddiam, the Jeddites do not even view them as human, they view them as demons who have been completely engulfed in evil, and rightfully so as the Sarvanists have enslaved dragons and driven those unfortunate enough to be born under their iron fists to the point of madness that leaves them in a state akin to horribly abused domesticated animals.