0.9,zh-cn Review

The user's primary preference is Simplified Chinese (zh-CN) . If that isn't available, their next choice is US English (en-US) with a 90% preference weight ( q=0.9 ). 2. Localization and AI Data

Using "Accept-Language" redirects (like detecting zh-CN ) can be tricky for . Many AI bots send a default value of en-US,en;q=0.9 , which might accidentally trigger an English version of a site even if the bot is trying to index Chinese content. 0.9,zh-CN

The Unicode CLDR (Common Locale Data Repository) uses "coverage levels" to define how much data is available for a locale like zh-CN . A "Modern" level (Code 80) contains all fields in normal use, while "Comprehensive" (Code 100) covers even more. 3. Practical Impact for Developers The user's primary preference is Simplified Chinese (zh-CN)