Al Bhed Language

Like its predecessor, Final Fantasy X, this game also has an Al Bhed language to decipher as you play, but it works quite differently this time around. The most important difference is that the Al Bhed Primers you receive as you progress through the game are not always the same number/letter.

Here are the locations of each of the primers:

Location
Chapter 1 · CelsiusTalk to Buddy and Brother on the bridge. Interacting with both of them will get you four primers.
Chapter 1 · LucaTalk to Rin in the basement of the Luca Stadium.
Chapter 1 · Djose TempleOn the floor of the Great Hall.
Chapter 1 · Macalania WoodsAwarded automatically during the scene where O’aka XXIII sneaks past you.
Chapter 1 · Bikanel DesertReceived the first time you arrive at the excavation camp.
Chapter 1 · Bikanel DesertDug up during the excavation Missions, alongside Potions and Sphere Break coins.
Chapter 1 · CelsiusReceived after watching the sphere video with Shinra.
Chapter 3 · Lake MacalaniaA reward for completing the Mission.
Chapter 3 · Djose TempleReceived once the Mission kicks off.
Chapter 4 · CelsiusReceived during the bridge conversation with Buddy, Paine, and Rikku.
Chapter 4 · CommSpheresAn Al Bhed man approaches and talks about what is happening there.
Chapter 4 · CommSpheresAn Al Bhed woman talks about the “password.”
Chapter 5 · Thunder PlainsCid gives you one after you defeat Machina Panzer.
Chapter 5 · Road to the FarplaneReceived at the end of the sequence.