Thanks to Ricardo Ruivo we now have the dopdf.com website translated in Portuguese (Portugal). If you are a Portuguese speaker you can access the translated website here: dopdf.com/pt/
The Brazilian Portuguese version is in the works too.
If you want to help us translate the website (or the interface), you can start by visiting this page: Languages. You'll see there in which languages doPDF is not translated, and if you want to help you'll simply have to email us and we'll reply with details. Practically the website has about around 1200 words that need to be translated (including the software name and untranslatable words like PDF) so it wouldn't take that long.