Kaki Ae, or Tate, is a language spoken by about 500 people, half the ethnic population, near Kerema, in Papua New Guinea. It was previously known by the foreign designation Raeta Tati.
Kaki Ae has been proposed to be related to the Eleman languages, but the connections appear to be loans. Søren Wichmann (2013) tentatively considers it to be a separate, independent group. Pawley and Hammarström (2018) treat Kaki Ae as a language isolate due to low cognacy rates with Eleman, and consider the few similarities shared with Eleman to be due to borrowed loanwords.
Kaki Ae is spoken in Auri, Kupiano, Kupla (), Lou (), Ovorio (), and Uriri () villages in Central Kerema Rural LLG, Gulf Province.
The Kaki Ae pronouns are:
Kaki Ae has no distinction between and . (The forms kaki and tate of the name both derive from the rather pejorative Toaripi name for the people, Tati.)
The following basic vocabulary words are from Brown (1973), as cited in the Trans-New Guinea database: