Week off

In theory, this week was supposed to be quite relaxing because there are no classes. But on Friday the teacher of one course (the one I have been telling about earlier) asked if I was going to attend his 2-day workshop, and since I would be the only foreigner he offered to translate all the material for me during the weekend. How do I possibly say no to that? So, tomorrow and Tuesday I'm running an imaginary company instead of having the days free.