Translation of drinkable in German

My mom and dad used to speak English when they wanted to say something I shouldn't understand. In this way I have learned English. I did not tell them till late, but I did understand every word they said.
If you do not want it, I understand since it is really little at the moment. But on the other hand, it is only 15 seconds to translate these short messages. Which link did you use? http://www.vocabulix.com?
I want learn Spanish because of my girlfriend from Guatemala. She is from Latin America. And of course I want improve my grammar too. I like to hear it, but speaking is still hard. Hasta Luego.