What frustrates the wart about language of ants in The Once and Future King?

The Wart, as a young boy, doesn't actually get frustrated with the language of ants in *The Once and Future King*. He is fascinated by it and learns to speak it!

He is initially skeptical when his tutor, Merlyn, claims to understand the language of ants, but after Merlyn translates a conversation between two ants, he becomes intrigued and learns to speak it himself. This experience teaches him the importance of open-mindedness and the wonder of the natural world.

There is no instance where the Wart is frustrated by the language of ants. Instead, he finds it intriguing and a valuable learning experience.