There is a batch with Greek text in a Latin batch set.
How can I ask someone (who can read Greek) do the indexing and review
It is "Ukraine, L'viv—Church Records, 1607–1945 [Part B][MMD3-CL7]"
excuse my ignorance but is that Greek or Cyrillic?
I think you just need to return the batch (don't mark as No, No Extractable Data though)
eventually it will get to someone who can read it or be identified up by the next stage of processing
Please return batches when you do not understand the language. As Ontymay has said, eventually it will go to someone who can index it.