Custom i18n system with typed translation dictionaries (~570 keys),
LanguageProvider context, and useTranslation hook. All 31 components
and pages wired with t() calls. Chatbot backend passes language hint
to Claude for Ukrainian responses. Language preference persists via
localStorage. SEO meta tags and html lang attribute update dynamically.
Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
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