Add translations with language toggle support and locale-aware challenge content#2443

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copilot/create-translations-language-toggle

Commits on Mar 7, 2026

Commits on Mar 9, 2026

Add locale-aware challenge content (explanation/hint/reason) with English fallback and translations for challenges 0-2

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Add translations for challenges 3-15 (explanation/hint/reason) in nl/de/es/fr/uk, including cloud variants

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Commits on Mar 10, 2026