Ever since I started learning Portuguese, I wondered what "janeiro" meant because I wanted to know what "Rio de Janeiro" meant. There's a city called "River of January"!
Check out Brazilian history (the time of discovery/exploration) for the story of how it got its name. We learned about it, but I don't remember the details.
why doesn't "go back" work as a translation for this sentence, but "return" is correct?
voltar = go back, return, come back, so your answer should be accepted!
It is an appropriate English translation, but still not accepted. Anyone running up against this should report it, as it's unlikely to get changed otherwise.