Slang:
Choeros - means 'pig' in latin, equivalent to b**ch on Earth
Aquilon - Latin term for the north-east wind, basically equals sh** on Earth
Chapter 4: 800 Credits
Proelia - comes from the latin word with the same spelling, means 'warrior' or 'fighter', Proelia is an endangered, supposed to be extinct species but because Gretal survived the destruction of their entire planet, the Proelia species lives on in the form of hybrids, mostly on Earth.
Reista - comes from the word ρέστα in greek means to change. In this universe they refer to a creature of the dark that can change its form depending on what they want others to see, it's a Southern species.
Seuthaieus - 'see-you-thay-ee-yus' is a planet in the southern system that is pink in color with white clouds and mists, their water and lands are all pink in color. Their buildings have a variety however and so do their forests wood and stone, only all plants have pink leaves and flowers/fruits.
Commutatia - means "commutator" in Latin, it refers to a species in the eastern system that can change into smoke and teleport at high speeds. It's a new species that looks a lot like humans only with more smaller bodies.
Chapter 5: Passing Through
Aileorp(s) - a creature that has an abstract form, with an average height of 175 for adults. It can pass through objects at will and is a living creature. Though there is no meaning in any earth languages it means 'Passing through' 'bystander' or 'hardworking one' in Unige.
Chapter 6: Universal Target