Speaking Hangman is a cross-platform bilingual game that's both fun and educational, and suitable for the whole family. You'll need to have a Java 2 Java Runtime Environment installed on your system to play the game. If you're not sure if the version of Java you're running is adequate to the task, you can test it on the page you download the program from.
After you download the program, enter
tar xzf speakinghangmanfree-0.2.0.tar.gz in the directory where you downloaded the archive. Before playing the game, enter the directory created by the tar extraction command and read the README, INSTALL, and LICENSE text files you'll find there.