From pretty early on in the game, you're given the opportunity to use a tool called a Combine Sphere, which allows you to import Al Bhed dictionaries from PS2 memory cards. This, in turn, enables you to play most of the game with all the Al Bhed translated, provided you have a friend who has finished the game and will lend you his/her memory card. This greatly helps in understanding FFX's fairly complicated storyline.
And if you're a total nerd, you can even encode/decode Al Bhed messages using a nifty translator crafted by Stefan Gagne (twoflowr@pixelscapes.com) and Enigmaopoeia (enigmaopoeia@hotmail.com). The translator, which will even tell you how to pronounce the Al Bhed it generates, is located at: http://www.pixelscapes.com/twoflower/albhed.html
So go check it out...yht ahzuo ouincamjac, oui pihlr uv vnaygc!