Opera or Oper?
July 26, 2019
July 27, 2019
The Leo dictionary doesn't give Opera as an alternative to Oper, however the Langenscheidt dictionary does.
Duden does include Opera but comments that it is the Italian name for Oper.
July 30, 2019
The spelling of "Opera" was indeed a typo: it should be Oper here to match the audio. As sfpugh's research indicates, Oper would be the preferred German term.
Thanks for pointing this out to us, and our apologies for the error! I have made sure that the lesson is updated.