1908_Allen Upward – ‘The East End of Europe’, (London), p204-205

But there was one man present who spoke excellent Greek, and
who told us that he hailed from a village in the neighborhood
named Klabasnitza. It contains 64 houses, not one of them
Bulgarian, and the Bulgarians have announced their intention to
destroy it. The people speak Macedonian among themselves, but
understand Greek as well.

I asked him what language they spoke, and my Greek interpreter
carelessly rendered the answer Bulgare. The man himself had
said Makedonski. I drew attention to this word and the witness
explained that he did not consider the rural dialect used in
Macedonia the same as Bulgarian, and refused to call it by that