In this study, I utilize previous scholarly work on the diachronic nature of the language used in the Book of Esther to propose that diachronic variety elements would be indicative of the author’s literary intent. The Book of Esther is commonly regarded as exemplifying a transitional language style. However, it is crucial to recognize that the language employed in the Book of Esther, categorized as belonging to the novella genre also reflects the deliberate linguistic choices made by the author.<br/> With this in mind, I focus on the discourses found within the text of Esther. In the Book of Esther categorized as the genre of novella, discourses serve as a critical driver of the main plot. I argue that the distinct Jewish and Persian identities are linguistically evident in the discourse. Particularly, I have examined specific discourses from the text of Esther and analyzed their usage of language elements which were considered as the diachronic marker. I find that expressions categorized as Early Biblical Hebrew and Late Biblical Hebrew are not used haphazardly or without criteria; rather, they are deliberately selected and employed to differentiate between Jewish and Persian identities. The findings suggest that certain language elements are best understood as authorial choices that reflect the deliberate literary intentions of the author rather than being solely attributed to natural diachronic development.<br/> To comprehensively comprehend linguistic diversity, it is essential to not only consider external factors such as the social context and historical period in which the text was written but also carefully examine the author’s literary intentions embedded within the text itself. An author’s language is not invariably constrained by the linguistic norms prevailing during their specific time and within their social milieu. Authors of later texts, particularly those who experienced a transitional phase of linguistic development might have been acquainted with both older and newer linguistic forms and skillfully employed elements from these two distinct linguistic phases for specific literary purposes.<br/> The language employed in the Book of Esther appears to possess characteristics of a transitional work, blending elements from Early Biblical Hebrew and Late Biblical Hebrew. However, as evidenced in this study, the various linguistic expressions in the Book of Esther can be more effectively understood in terms of the author’s literary intent rather than solely through the lens of diachronic complexity. This approach allows for a more nuanced and comprehensive understanding of the language used in the Book of Esther.