Translation of bladder in German

I guess you know Spanish very well. I'm not on line most of the time. I think to get accommodation in the city is hard. I have many friends in Madrid, they all live outside the city. I think we can help each other to practice German or Spanish.
Our fisherman stopped the boat and his nine year old girl opened a box with souvenirs, clothes and hats. We were in the middle of a river not going anywhere and had to start buying things.
We decided to make a one day trip to Bolivia, which turned out to be the correct decision. Instead of driving all the way up to the Salar de Uyuni, we stayed close to Chile and visited the area of the lagoons.