Tok Pisin , an English - based creole , is the most widely spoken , serving as the country 's lingua franca .
Its official languages are Tok Pisin , English , Hiri Motu and Papua New Guinean Sign Language .
Tok Pisin , an English - based Tok Pisin , is the most widely spoken , serving as the country 's lingua franca .
Its official languages are Tok Pisin , English , Hiri Motu and Papua New Guinean Sign Language .