The Language Familiarization Game is designed to let you test your aural recognition skills on a wide variety of languages. The tool has a database of voice samples in over 2,000 of the world's languages. You can choose a set of predefined languages to test yourself on, or you can create a custom language set. The voice samples currently are heavily skewed to religious broadcasts, since those were by far the most widely available samples, particuarly in the least common languages.
We have tried to ensure that the language samples are actually what we say they are, but some may be mislabeled (in fact, for most of these, there is no one to ask if they are properly labeled). If you do find a sample that is improperly labelled, please let us know and we will try to fix the problem.