This presentation provides a brief overview of literature and new research on language variation among Datooga-speaking communities, with a special focus on the Asimjeeg (Isimjega) variety. Note: This talk has not gone through a process of peer review, and findings should therefore be treated as preliminary and subject to change. Acknowledgement and citation: Griscom, Richard. 2019. Linguistic diversity among the Datooga. Talk given at the Rift Valley Webinar Series. 01/05/2019.