The Turuamian people from the planet Turuame are humanoid species with hair colors and/or eye colors that would usually be unnatural in humans like pinks or purples and a longer life span (100 years longer) than humans. They were once a strong people that conquered many planets including Earth by either militarily or economically. Over time their language and culture spread overtaking other languages and cultures even eliminating some. As they conquer much of the galaxy they gained many enemies and many rebelled against them. Eventually they spread their forces too far and their home planet was attacked and overtaken by a group of rebels from not only other planets but from their own. They were forced to evacuate as many people as they could though many still perished. To this day despite being forced to travel the galaxy looking for a home, they still have forces fighting to reclaim their old homeland.
The lose of the Turuamian home planet marked the fall of their empire. After news spread of that other people started to rise up and fight against them gaining back their independence. One of those planets was Earth. A rebel group called the the Alliance of Freedom, lead by a man named Calvin, united the world to fight against the Turuamians. After they won the war and gain the world it's freedom he became a hero and the first emperor of the Earth, going down in history for his achievements.
It has currently been 2000 years since than and while the Turuamians and Earthlings have been both trying to build a better relationship with each other. Not only is Earth one of the few planets accepting Turuamian refugees but there are also groups advocating to help the Turuamians find a home. However many people still hold grudges and prejudice on both sides. Many non-Turuamians feel like Turuamians are all cruel, stuck up, conniving and whiling to do anything to be on top, while Turuamians often feel that non-Turuamians are uncultured, ungrateful and unforgiving savages and thieves. Worst of all people who are of Turuamian decent or Turuamian refugees are often hated by both Turuamians and non-Turuamians but they also tended to hate them back.
Even with all of the bad blood between the Turuamians and everyone else their language is used across the galaxy when communicating with other planets. People who know the language tend to be have important high paying job so it also spoken amongst elite groups.