Daatsʼiin is a Gumuz language of western Ethiopia. There are two communities of speakers in western Ethiopia, one in , on the northeast border of Alatish National Park, and one in on the Sudan border, south of the park where the Rahad River crosses from Ethiopia into Sudan. Daatsʼiin was first reported in 2013 and described by Colleen Ahland in 2014. Ahland has described it further in 2016. A comparative word list of Daatsʼiin, Northern Gumuz, and Southern Gumuz is available in Ahland & Kelly (2014).