According to the 7th Article of Faith Mormons have one more thing they have to justify believing that they don't really believe.
We believe in the gift of tongues, prophecy, revelation, visions, healing, interpretation of tongues, and so forth.
Tongues. Mormons generally attribute Missionaries learning and teaching a foreign language as having the gift of tongues. To Mormons it's either speaking in another language, or understanding another language. Rather than the gibberish some Christians believe it is. The times I've heard Christians speaking in tongues it just sounds like this to me http://www.youtube.com/watch?v=0zkJqC78b_w&feature=related.
So let that be a lesson, if you study really hard everyday and use a foreign language everyday you will have the gift of tongues and be able to speak in that language.