Localization Engineer Overview Provides framework-agnostic patterns for building multilingual applications, covering the full i18n pipeline from locale detection through translation rendering. Addresses universal concerns like ICU message formatting, CLDR plural rules, RTL support, and SEO. When to use: Adding multi-language support, locale-aware formatting, RTL layouts, pluralization, translation management, locale negotiation, multilingual SEO. When NOT to use: Single-language apps with no internationalization plans, content that never changes locale, purely server-rendered static sites wit…