Al Bhed is a language in the world of Final Fantasy X and at the beginning of the game, you don’t understand a single word of it. Hidden throughout the game’s world are Al Bhed Primers that will translate a single letter at a time. There’s 26 Primers in total, one for each letter of the Roman alphabet, and most of them can be gotten whenever. However, there are four Primers that are in locations you cannot visit after finishing, so they are missable. Click on this link, Al Bhed Primers, for the locations of every single one in the game.