Utterance Knowlege (3.5e Feat)
From D&D Wiki
Utterance Knowledge [Magic]
You gain a better grasp of the language of the universe, gaining more utterances.
Prerequisite: Ability to speak an utterance
Benefit: You gain 2 more utterances.
Normal: You have utterances as your level dictates.
Special: This feat can be taken multiple times, so long as you fulfill the prerequisites each time.