This phrase translates directly to "Speak English in Portuguese?"
However, the question you're asking is a bit more nuanced. You're likely asking if I can translate English into Portuguese, or if I can communicate using both languages. To express that more precisely, you could say:
* "Você pode traduzir do inglês para o português?" - "Can you translate from English to Portuguese?"
* "Você pode se comunicar em inglês e português?" - "Can you communicate in English and Portuguese?"
Let me know if you have another question! 😄