President Mutharika said this on Saturday at Paramount Chief Lundu's Mbewe wa Mitengo Headquarters in Chikwawa when he presided over the launch of Mgumano wa Amang'anja na Sena.
The Malawi leader said celebrating culture has always been a vehicle for unity and should be left as such.
"Cultural groups are important as they promote unity and tolerance. While I recommend the formation of such groups, let us not forget that we are all Malawians at the end of the day," said Mutharika.
The President also urged the Mang'anja and Sena to do away with harmful cultural practices such as fisi and kulowa kufa by saying such practices counter the battles against HIV and AIDS in the country.
Mgumano wa Amang'anja na Sena was established about six years ago with an aim of promoting Mang'anja and Sena cultures.
According to the groups board member Owen Chomatika, Mgumano wa Amang'anja na Sena was also formed to spearhead the fight against HIV and AIDS, gender based violence and also fighting against some harmful cultural practices.