You misread the literary conceit of that section. Read the last paragraph. He didn't actually mean that assertion, but he's borrowing a lead-in from Borges. Hen

You misread the literary conceit of that section. Read the last paragraph. He didn't actually mean that assertion, but he's borrowing a lead-in from Borges. Hence, the balance of his self-admonition of speaking only one language against the fingerprint-ability of a language that borrows heavily from others.