The Dirty Language Books come in a variety of languages such as Chinese, French, Italian, Spanish, Japanese, Portuguese and Korean. The books teach you vulgar, naughty and extremely offensive terminology.
The Dirty Language Books are absolutely hilarious. You'll learn how to say "Where did that nasty man touch you?" in Chinese or "Could I motorboat your..." in Spanish. This is definitely a fun way to learn; I guarantee you will laugh your fundillo off learning new these languages.