Translation of Mundstück

Luckily it didn't happen to me, my kids really grew up with us all the time. And besides, they are not allowed do that, because they are monitored endlessly. If they don't attend class they could find themselves on the next train going home.
My name is Wolfgang, and I am interested to build my Spanish vocabulary. Maybe we can practice together. How long have you learned Spanish? I have been learning for a few years with books.
You're a nice person and you are very talented. That is great. Thank you so much for your response, it's nice to become friends. Well, I'll tell you more about me but not today, soon ...