Not only does "Immigrant Blues" talk about learning another language, but our speaker is also obsessed with going over different names or titles for aspects of the immigrant experience. The ways these names shape how we understand ourselves and how we relate to others seem to be the main concern for our speaker. He seems to worry, too, about the limits to expression and communication, as if language isn't quite enough. This is a pretty big obstacle for a poet, don't you think?
Although it might appear to demonstrate the limits of language, our speaker's constant renaming of his story actually demonstrates just how flexible and useful language can be. The use of such different names allows our speaker to address so many different aspects of one complicated issue.
Our speaker's constant renaming demonstrates the limitations of language. No matter how many times he tries, he can never quite say what he means.