Recommendation from the B4D Forum:

If you are looking for sworn translators in Brasilia, there is a list of all registered sworn translators on the Junta Comercial, Industrial E Servico Do Districto Federal (Commercial, Industrial And Services Board Of The Federal District).

You will also find the fixed translation fees and related translation costs on the website.

Currently they have registered sworn translators for German, Arabic, Spanish, French, Dutch, English, Italian, Romanian, Russian and Japanese.

The website is constantly updated.