Adds German and French translations for form submission pages with
dynamic message handling and language selector integration.
**Pages Updated:**
- case-submission.html: Added data-i18n attributes and language selector
- media-inquiry.html: Added data-i18n attributes and language selector
**Translation Files Created:**
- EN/DE/FR for case-submission (form labels, help text, dynamic messages)
- EN/DE/FR for media-inquiry (form labels, help text, dynamic messages)
**JavaScript Updates:**
- case-submission.js: Added i18n translation helper for dynamic content
- media-inquiry.js: Added i18n translation helper for dynamic content
- Submit buttons and error messages now translate based on selected language
**Features:**
- Language flags visible in navbar for easy switching
- Form labels and help text translate on language change
- Submit button text updates during submission ("Submitting..." → "Einreichen..." in DE)
- Success/error messages display in user's selected language
- All translations via DeepL API for professional quality
**Technical Details:**
- Uses cache-busting timestamps for translation fetches (prevents stale cache)
- Submit buttons use <span data-i18n> for translatable content
- Form JavaScript uses window.i18nTranslations for dynamic text
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude <noreply@anthropic.com>
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