"I encourage te reo use but in no way will I tolerate tokenistic use of reo by govt agencies as an attempt to show govt depts are culturally competent."
Allan's office has not responded to Herald requests for an interview.
The Herald asked DoC for an explanation and an interview but received only a short statement from government services director Lucy Alcock in response.
"Minister Allan was concerned that DoC's use of māori [sic] language could read as cultural appropriation or tokenism.
"She was also concerned at inappropriate use of terms.
"The internal email did not adequately explain the minister's position or concerns.
"DoC is committed to being a good treaty partner, including improving our use of te reo."
Allan on Monday was moved out of her conservation portfolio to allow her to take on justice, after the announced departure of Kris Faafoi.