In what language does Vava mean Grandmother and Papu mean grandfather?

Answer 1

It's Greek - the tranliteration of Grandmother should be Yaya (Vava does not give the Greek lettering it's proper form)

No, It deals with Ladino or Judeo Espanyol, the lenguage spoken e.g in Greece or in Turkey by Jews whose ancestors came from Spain in the 15th Century

Answer 2

In Greek.