The Flagbearer of the New Patriotic Party, Dr Mahamudu Bawumia, has criticised former President John Mahama for using indecent language and inciting the public against the ruling NPP government. Dr Bawumia, while speaking at Nsakina in the Amasaman constituency of the Greater Accra Region on Monday, chastised Mr Mahama rsquo;s recent pronouncements.