Translation of corrosive 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.
Can you speak English or Chinese? It would be easier to learn. I will correct you and you will help me, OK? From where in China are you? I know only Beijing and Shanghai, oh yes, and Hong Kong.
I live right next to Montpellier, in a small town near the coast, in France. I have no children and I'm learning Spanish because I like foreign languages. I learn vocabulary and grammar. Vocabulix helps me a lot.