- Language: Diitiidʔaatx̣ (Nitinat)
- Alternate names: Ditidaht, Nitinat, Nitinaht
- Language code: dtd
- Language family: Wakashan, Southern Wakashan (SIL classification)
- Number of speakers: 7
- Vulnerability: Endangered
The name Ditidaht is commonly used for the traditional language that is shared by the present-day Ditidaht and Pacheedaht, though only the Ditidaht also use the name as an ethnonym. The Ditidaht and Pacheedaht peoples have distinct ethnic identities from each other, as well as distinct ethnolinguistic identities from their most closely related neighbors, the Nuu-chah-nulth (See: [[Nuu-chah-nulth]]) of Vancouver Island, and the Makah (See: [[Makah]]) of the Olympic Peninsula (Washington, United States).
Diitiidʔaatx̣ (Nitinat) is spoken in Canada, North America.