"To all the well spoken people in Aotearoa, u will all need to learn a new english. Its called Hori lol. Cos thats basically all i speak haha [sic]," he tweeted.
In an interview with the Northern Advocate ahead of his national tour, Walker said he'd improve his English when te reo was given the respect it deserved and Kiwis pronounced his native tongue properly.
"I'm going to keep speaking like this until people get their Maori right."
His main message to critics of his mangled English is: "I don't care".
He feels that in his home country he can be himself. "I have to talk flash in Australia.
"I'm proud to be from New Zealand. I'm proud to be Maori."
X Factor NZ is up to episode 23, with the top five battling it out tomorrow night.
Read a full interview with Walker in next Saturday's Northern Advocate.