Additionally,  river ka serves as a traditional boundary that separates Benue-Congo group languages of Zuru Emirate from the Afro-Asiac group of Gummi and Bukkuyun to far north,. Some of the ancient communities of  river ka are Waje, Kyabu, Danko and Warri districts in Zuru Emirate of Kebbi State..
The river acts as a geographical division between the Benue-Congo language groups spoken in Zuru Emirate and the Afro-Asiac group of Gummi and Bukkuyun located further north.  Several ancient communities reside along this river, including Waje, Kyabu, Danko, and Warri districts within Zuru Emirate's Kebbi State.