Flutter Localization Tutorial: ARB Files, gen-l10n & Plurals (2026)
Complete guide to localizing a Flutter app in 2026 with the official flutter_localizations + intl workflow. Covers l10n.yaml setup, ARB files with @key metadata and placeholders, flutter gen-l10n code generation, ICU plurals and select, date/number formatting, runtime locale switching, RTL support, and exporting ARB strings to PO files.