Final Cosmere post, except for maybe Great People. I haven't done flags because there are thirty city-states and I don't feel like colouring in thirty flags.
Berizhet - Receive the Fashion and Smokestone Luxury resources. These cannot be earned any other way in the game, and provide 6 Amenities each.
Iiaria - +2 culture for every tech you have researched more than your civics (excl. negative)
Kharbranth - All units heal 10 HP at the end of each turn, regardless of what they did.
Khlennium - +25% production towards wonders in your capital.
Pahn Kahl - Your cities converted to your religion get +2 amenities. R&F - Your cities converted to your religion get +1 Loyalty for every Plantation
Bornwater - +1 production to tiles with a Mine or Quarry for every 5 population in the city.
Elantris - Your cities get +25% to all yields, but -1% for every tile between them and your capital.
New Natanan - Trade Routes get +1 gold for every 5 water tiles they pass through in one trip.
Patji - Unlocks a support unit: Aviar. Units within a range of 1 tile of an Aviar get +1 sight (non-stackable) and are invisible to all but adjacent units. 2 movement, 2 sight, production cost: 50 * Era (i.e. 50 in the Ancient Era, 100 in the Classical, 150 in the Medieval, etc.), maintenance cost: 1
Weathering - All mines in your territory give +1 gold. Mines on Luxury resources give an extra +1 production on top of the gold.
Herdaz - +10% Great People Points for every civilisation you are at war with.
Huth & Kuth - Gain an envoy every time you retire a Great Scientist.
Lasting Integrity - Your units gain +2 c.s. for every city-state you are suzerain of.
Narak - Units receive +5 c.s. in defence when in your home territory.
Urteau - All cities have full housing as if they are adjacent to fresh water.
Bevalis - +2 faith for trading posts in cities with at least one mountain tile.
Ker Kedasha - Foreign civilisations converted to your religion get -25% production towards units.
Rall Elorim - +1 Wildcard Slot for every continent you have settled on. GS - Cities settled on a continent different to your capital produce +10% Diplomatic Favour for every Wildcard Slot in your government.
Teoras - Can buy naval units with faith equal to gold cost.
Wiestlow - Wonders provide +25% tourism to civilisations following the same religion as you.
Akinah - Barbarian Outposts give Tribal Village bonuses on top of their gold.
Ire - +1% science in your cities for every religious citizen in the city.
Kandra Homeland - Gain a spy slot and a free (but still has maintenance cost) spy to fill it even if you haven’t discovered Diplomatic Service.
Seraven - Coast tiles in a city with a University get +1 Science.
The Ones Above - Campuses provide +1 Trade Route Capacity.
Celebrant - Trade Routes get an extra 10 range and get an extra +1 gold for every Trading Post.
Eelakin - Your Trade Routes gives +1 gold for every Luxury resource in the destination city.
Fu Abra - Embarked units get +1 movement for every 5 Fishing Boats in your empire.
Silence's Waystop - Foreign units in your territory lose 1 HP per turn for every 2 food income in the city.
Relu-na - Traders can receive EXP and promotions.
1 EXP for every 2 turns it takes (at the end every trade)
Extra 1 for every 3 resources (e.g. food, production, gold, etc.) earned per turn by the trade
Extra 2 for every one of your trading posts along the way
10 when a Great Merchant is earned by you
15 if a Great Merchant is retired in the origin city