Are there any Portuguese language cruise ships for Portuguese speaking passengers?

Answer 1

Any cruise ship that only calls at Brazilian ports must follow Brazilian legislation, so we can assume that the staff will probably be all Brazilians or at least be able to speak Portuguese as in most other businesses in Brazil. CVC operates cruises within Brazilian ports according to this link:

https://www.cvc.com.br/lp/promocoes/cruzeiros.aspx