Jest

Jest is an effective testing tool for front-end and back-end apps. It includes features like snapshot testing, parallel test execution, and inbuilt mocking.

In the context of localization, Jest can be used to verify translated content, validate internationalization (i18n) functions, and ensure that language-specific formatting works correctly across different locales.

With Jest and localization testing libraries like react-intl, i18next, or FormatJS, developers can automate checks for missing translations, detect broken language switches, and confirm that pluralization rules are correctly implemented.

🔧 Tasks Jest can perform: #️⃣

• Test internationalized content and ensure that translations load properly.
• Detect missing or incorrect localized strings in multilingual applications.
• Ensure that locale-specific formatting (dates, numbers, currencies) is handled correctly across different languages.
• Check that UI elements adjust dynamically based on language settings.

By integrating Jest with localization workflows, teams can prevent linguistic errors, detect broken placeholders, and confirm that pluralization rules are correctly applied.