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 boundary separating the Benue-Congo language groups of Zuru Emirate from the Afro-Asiac group of Gummi and Bukkuyun located in northern regions.  Waje, Kyabu, Danko, and Warri districts are ancient communities situated along this river within Zuru Emirate's Kebbi State.