I'm a real sucker for a nice big mix, including melee and closer range weapons still definitely in play (occasionally augmented with more advanced tech). Vibro-blades and lightsabers spring to mind as an example.
Vibro-blades always make me shutter. I know lightsabers are usually considered to be more dangerous, and I have no idea if a vibro-blade would even hurt that badly, but I can't help but think an ultrasonic vibration of metal cutting into you would be... ouch. Keep those vibrators from hell away from me.
(Definitely would be cool to have them in the RP, tho)
@Jeyma All very good.
In language, I was going to go for the cliched 'common' as the lingua franca of the galaxy - like Greek was and Latin became. Means we can all communicate, but also have our own languages. Might call it something else though.
That could be fun. Might allow us the opportunity to give some characters ridiculous accents when speaking Common. That being said, calling it Common is boring. No offense
So for what the language itself is named, I have a few suggestions:
-Hoi Polloi (a word meaning "common people" or "the masses")
-The Tongue
-Trade Tongue or Trade Language (because it would be often used when foreign nations are trading and conducting diplomacy)
-Shelesh (the name of a language in Mass Effect: Andromeda, which was created from many other languages)
-Human or Humani or Humana (if it's spoken mainly by humans, anyway)
-Syntax (or any word that means something along the lines of "Speaking correctly")
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My personal favorite idea is calling it the Trade Tongue, or Humana.