Teaching Assistant in summer

Hello!
My name is Kristina and I'm studying International Cultural and Business Studies in Passau, Germany. 
To improve my Spanish I am looking for a hostfamily where I can work as a teaching assistant 3 hours a day. In exchange, I would stay at your house.
I speak German, English, French, Spanish and a little bit of Portuguese. I can help in German, English or French. The month of September would be perfect for me.