"Oh if you have a knack for languages, this is your playground," Aziraphale nodded in understanding, patting one of the books on the counter. "Plenty of earthly languages to get exposure to here."
The Enochian, however, might be tricky. With a language expert around, now, he wouldn't be able to brush the angelic books off as ancient writings as easily as before. Still, Aziraphale wasn't worried - he was never worried. Crowley called it naiveity, but Aziraphale wasn't worried about that either.