even tho it's close, I think it would be Podemos volver. Regresar = To return, Volver = To Come Back, and To Return. I guess DL is being strict on the synonyms.
This is definitely a valid translation. Reported it 8/8/2015. Come on everybody! The more reports they get, the more likely they are to correct it.
Duo seems to be particularly resistant to accepting "able to" or "may" as a translation for "poder." I suggest you either continually report it or go with the flow and translate it as "can."
OK, between normal and slow, can you make up my mind? Is it Nosotros (normal) or Nosotras (slow)???? Reported