Races of the Land of the Ten Clans

I not only want the Land of the Ten Clans to be Asian-flavored fantasy, but I also want it to be human-centric. Therefore, there will none of the standard D&D non-human flavors of demi-humans such as elves, dwarves or halflings. I do, however, want there to be distinct differences between the various human factions. Therefore, rather than using the standard human racial traits, I propose the following:

Humans in the Land of the Ten Clans

• +1 on two Ability Scores of your choice
• Proficiency in one Skill of your choice
• Subrace

Human Subraces in the Land of the Ten Clans

Beongae (Lightning)

• +1 Str
• Advantage on Athletic checks when swimming; auto succeed on DC10 or less
• Double Con when determining how long you can hold your breath
• Languages: Common and Beongaego

Doku (Poison)

• +1 Int
• Ability to write in a Cipher that requires magic or a DC of (your Int + Proficiency Bonus) to read. It is possible to teach allies to read your cipher without a check.
• Languages: Common, Dokugo plus 3 additional Languages of your choice

Gweilo (Outsider)

• Gain 3 proficiencies in any combination of skills or tools of your choice
• Languages: Common and Gweilogo

Huo (Fire)

• +1 Con
• Base Move is 35 feet
• Advantage on Con Saves vs. Exhaustion
• Languages: Common and Huogo

Korudo (Cold)

• +1 to an Ability of Choice
• Gain Saving Throw Proficiency with that Ability
• Languages: Common and Korudogo

Suan (Acid)

• +1 Wis
• You can read lips. As long as you can see a person's lips, you can get a good idea of what that person is saying (though not exact without actually hearing the person) 
• +5 on passive Wisdom (Perception) and passive Int (Investigation) scores
• Languages: Common and Suango

This set-up also allows me to change what are considered to be Standard Languages in the Land of the Ten Clans. Here is the list, where the Script from more traditional D&D languages is indicated in parenthesis:

Common (Draconic)
Beongaego (Elvish)
Dokugo (Draconic)
Hengeyokai (Elvish)
Gweilogo (Celestial)
Huogo (Draconic)
Korudogo (Dwarvish)
Oni (Infernal)
Suango (Draconic)

Note: I do plan to allow PCs to be Hengeyokai, but rather than a separate race, they will be represented by a Background.