The Strapi i18n plugin allows developers to create applications that can be easily translated into different languages without requiring significant engineering changes, enabling internationalization. The plugin simplifies the localization process for Strapi users by providing a straightforward way to install and configure it. Once installed, the plugin enables features such as creating new locales, editing Post content types, and fetching localized contents using API requests. By utilizing the plugin's capabilities, developers can create accessible and user-friendly applications that cater to diverse language preferences, ultimately enhancing the overall user experience.