5e Indrateran Humans

(PROVISIONALLY - im fooling around, check with me first -) if you make a Human character in D&D 5e for one of my campaigns in Indratera, you can have a feature from below. These work if you pick human or variant human. I think. Or maybe ill expand it to other races. Idk. Look this is just me writing down a faint idea not doing anything concrete. My reference is Sentient People of Indratera.
== Euluskan ==
* Can add double proficiency bonus on checks related to languages or to horses.
== Vortai ==
* Can drink saltwater
* Can free-dive twice as deep and hold breath twice as long
* Gain advantage on saves against diseases
== Rakki, Essu, Fenet, or other Rakkimarran ==
* Able to eat raw meat without issue
* Can add double proficiency bonus on checks related to reindeer herding or whaling
*
idk 
== Vreigardt ==
== Vistu ==
* Able to lucid dream at will and contact others whilst both dreaming
* Advantage on saves against being put to sleep or being mind read
== Kaneeyi ==
== Caliveran ==