Translation from English to Portuguese (PT-PT)

Hi there!

I've been using KOReader since a week now and I'l already a fan.

I read a lot in English and since it is not my native language, I find myself often using the "translation" function that works almost flawlessly.

The thing is that KOreader translates the English to Brazilian Portuguese (PT-BR), and I would very much like it to translate to Portuguese (PT-PT).

Is there a way to add this language to the translation languages?
BTW, what is the translation service used?

Thanks in advance!