This update improves dynamic language variant handling across URL, cookie, and redirect logic, including dynamic regex generation for enabled languages. It adds a 'first visit no conversion' option to both network and site settings, updates admin UI labels to Chinese, and refines the sitemap module to generate rules and output only for enabled languages. Cookie setting now uses secure attributes, and sitemap URLs in the UI reflect the actual enabled language set. Several regexes and logic paths are now dynamically generated based on the current language configuration, improving flexibility and correctness.