newar lai jyapu bhanne ra khadgi lai kasai bhanne yeutai kura ho.

Alece, maybe lot of new generation shrestha's do not speak newar but that doesn't have anything to do with Jyapu. Lot of Jyapus are ashamed of their last names so they even change their last name to Shrestha so that people will not know they are jyapus.

I know my last 3 ancestors lived in Lalitpur and we speak in Newari if that helps you understand my point of view.