The creature does not learn to speak in later readings. His ability to speak is established early in the novel, and his learning of language is a crucial part of his development and his eventual alienation from humanity.
Here's how the creature learns to speak:
* Observation and Mimicry: The creature observes the De Lacey family and their interactions. He memorizes words and phrases, carefully noting their pronunciation and usage. He even learns to read by studying their books.
* Desire for Connection: The creature's primary motivation for learning to speak is his longing for connection with other humans. He sees language as a key to understanding and being understood.
* Self-Taught: The creature's language skills are entirely self-taught. He is isolated and alone, and his learning process is both remarkable and heartbreaking.
It's important to remember that the creature's speech is not perfect, but it's fluent and sophisticated enough to allow him to interact with humans and express his thoughts and feelings.
Perhaps you're thinking of a different story or a different aspect of the creature's learning. Could you please clarify your question?