Identifying the primary language of a web page illustrates which web accessibility principle?

Identifying the primary language of a web page is critical for ensuring that content is understandable to users. This aligns with the principle of being understandable, which emphasizes that information and user interface components must be clear and comprehensible. By specifying the primary language of the content, assistive technologies can accurately interpret and present the text to users who rely on these tools, such as screen readers. This enhances user comprehension and facilitates a smoother interaction with the content, particularly for users who may have language preferences or limitations. Clarity in communication is essential for creating an inclusive digital environment that accommodates diverse audiences.

Other principles, such as operable, perceivable, and robust, address different aspects of web accessibility. Operability focuses on ensuring that all users can navigate and interact with the content effectively. Perceivability deals with making content available to the senses, ensuring it can be seen and heard. Robustness relates to creating content that can be reliably interpreted by a wide variety of user agents, including future technologies, but does not directly address the clarity or understandability of the content itself.