Good afternoon,
I'm a portuguese native, and, for a life, I write (not in a PR area, in legal, but as it turns out there's also a grey area in law that allows you to write just about anything).
As such, my experience in PR articles is limited, but I have good writing skills and a naturally good comprehension of the portuguese language, and, as such, I believe to be a suitable freelancer for your project,
Best regards,
Ana