But for the project to work it needs the help of the public.
People can visit koreromaori.com and record themselves reading the provided sentences in te reo Maori, you can play the recording back and if it sounds good you click save and a new sentence will appear.
Mr Mahelona said by doing this they are teaching the sounds and phonemes of te reo Maori to machines.
"We need a large variation of people from different ages and different genders and that's because we all don't sound the same and we all don't sound like a robot so having the variation in voice allows the machine to better understand anyone that speaks to it."
There is also an option to listen to recordings and give a thumbs up if you think the pronunciation is correct and down if you think it is incorrect.
Mr Mahelona said this was a way of crowdsourcing the quality control but experts in te reo Maori were also listening to the recordings.
Charmaine Soljak, The Hits Northland day announcer, enrolled in the Te Wananga o Aotearoa three-year te reo Maori course in 2015 after her 5-year-old mokopuna told her she had used a Maori phrase inaccurately.
Ms Soljak said the Korero Maori project would engage people and she has already been on the website to record sentences.
"I think anyone takes great delight with anything you can use in te reo and if you could use it on your phone that's so cool," she said.
Mr Mahelona said since launching the campaign on Facebook on Saturday there had been 400 new users and an hour of recordings.
"We think we need about 200 hours to have a good acoustic model."
The next step is to teach the computers to understand and speak te reo Maori - he said there are number of tools to do this however Te Hiku Media were still deciding on how they would do it.