Some Nomenclatures:
Vijayanagar
Unique Unit:
Polygar (Horse Rider) (feudal title given to nobilities in south india who mustered troops)
Unique Techs:
City of Victory (stronger villagers) (vijayanagar the city of victory, magnificent city built in hampi)
Arab Horses (stronger cavalry units) (vijayangar often hired mercenaries from western coast from arabs, proved fatal in battle of talikota when some muslim general switched side to opposing deccan sultanates)
Wonder: Brihadeswara Temple/Meenakshi Temple
Orissa
Unique Unit:
Paikaraya (Elephant Mounted Unit) (leader of paika army, gajapatis literally lord of elephants pushed the vijayanagar troops to ramsetu (strait of sri lanka)
Unique Techs:
Cult of Jagannath (lower conversion rate) (lord jagannath’s culture is a unifying factor in the region, modern day states of orissa and chhatisgarh have lowest muslim populace historically)
Heritage of Sadhabas (faster naval units) (ancient ships boitas were used to have trade connections with java, sumatra, ceylon and south east asia. bali jatra festival)
Wonder: Konark Sun Temple/Jagannath Temple
Delhi:
Unique Unit:
Amirs (Cavalry Archer)(delhi sultanate used afghan turkic mamluk cav archers, they repelled multiple mongol invavsions using their cavalry archer tactics.
Unique Techs:
Throne of Hindustan (faster gold income) (triumph over delhi the capital of hindustan)
Grand Trunk Road (cheaper villager) ( Sadak-e-Azam/Badshahi Sadak is a network of road maintained in the northern gangaetic planes connected to central asia)
Wonder: Buland Darwaza/Qutb Minar
Mewar:
Unique Unit:
Purbiyas (Camel Cavalry)(Rajput Led Mercenaries working in the Gangaetic Plains)
Unique techs:
Chittorgarh Fortress (stronger castles) (enourmous fort complex, many other such fortresses such as kumbhalgarh fort, mehrangarh fort, ramthambore fort exist in rajptana region)
City of Lakes (cheaper farms) (udaipur the capital of mewar also called the city of lakes has 7 major lakes in the city)
Wonder: Karni Mata Temple/ Vijayastambha
Bahmani:
Unique Unit:
Pindari (Raiding Cavalry) (Muslim Irregular Raiders who raided and plundered villages, also known as Bidari after Bidar the capital of Bahmani Sultanates)
Unique Techs:
Mahmud Gawan Madrasa (cheaper university techs) (An ancient islamic madrasa(university) in the deccans in bidar, karnataka)
Malik-i-Maidan (stronger bombard cannons) (literally lord of battlefield, powerful cannon installed in the bijapur fort)
Wonder: Gol Gumbaz/Char Minar