When you don't speak a language, don't sound like you speak the language

I appreciate the help from Christoph and Voo in refining my German. But that reminds me of a story about a friend of a friend. She was in Japan to visit some friends. Although she speaks English and Mandarin fluently, she doesn't know any Japanese, so her friends taught her how to say "Sorry, I don't speak Japanese." She managed to say this sent...