Hi mate, you've done great job!
I can provide Polish translation if you wish, just send me the file.
BTW I'm having some problems with Win client. When I sync it with phone it's saying that so many entries have been synced and added to database but when you look into expenses, etc it's empty! Have tried importing it by csv and adding entries manualy but it's same scenario everytime. I've played with date format as suggested in previous posts but it hasn't helped. Any ideas?