'Vetulla' (see Skt. vitata) and 'Vaipulya' (see Skt. vaipulya) is
interpreted as "expansionist", i.e. expanding the Buddhist Canon by
adding 'lost' sutras.
r> In the navangas, does "vedalla" = Sanskrit "vaipulya"?
No. It's answers to questions. See, for example, Culavedalla sutta.