How does Gilman use changes in language (diction tone) to affect the narrator's shift from seeming sanity to madness?

In "The Yellow Wallpaper," Gilman employs shifts in diction and tone to reflect the narrator's descent into madness. Initially, the language is measured and precise, illustrating her attempts to articulate her thoughts and emotions clearly. As the story progresses, the tone becomes increasingly frantic and disjointed, mirroring her growing obsession with the wallpaper and her deteriorating mental state. This transition in language not only highlights her isolation but also serves to immerse the reader in her psychological unraveling.