Is see there is a Portuguese-Brazilian translation for OMP, but it is only 67% completed and not included in the OMP release. You could volunteer to complete it (https://www.transifex.net/projects/p...t-mediaplayer/) and ask gidzzz to be the language maintainer.
pt_BR...keep forgetting that though in portugal we obviously speak the correct and original portuguese we are in fact so few people compared to brazilian..