I am an English and Portuguese teacher here in São Paulo, Brazil, and I've been teaching for 6 years, now. On the side, I've always translated texts and articles to and from both languages and I can honestly say the results have been good!
If you wish to give me the honor of doing the work you need, rest assured that your content will be fully localized - that is, it will fit the context of the Brazilian or English cultures, as much as you need them. Young audience? Can do. Ultra-formal? Leave it to me. Seriously, I can do almost everything and what I don't know, I research it to make it happen in the best way possible.
Have a check on a sample pdf I have just translated. I'm limiting myself to 500 words maximum to get a feel of how the fiverr public reacts, but I am open to further offers.
Thanks for reading, and have a great day!