The complete guide to internationalization in Next.js

Creating multilingual web applications has become more accessible with tools like Next.js and Lingui.js, which facilitate internationalization and localization processes. By leveraging Next.js for internationalized routing, developers can manage different language preferences through subpath or domain routing, allowing users to access language-specific pages. Lingui.js complements this by handling translations, using configuration files to define supported languages and fallback mechanisms for untranslated content. The integration of Lingui.js with React involves using components or Babel macros to simplify the translation process, with message catalogs created for translators to update. These translations can be dynamically loaded and switched at runtime, managed within a Next.js app using hooks and router methods. The article also introduces pseudolocalization as a testing method to ensure all text strings are properly localized. This comprehensive approach, combined with features like static rendering and efficient translation workflows, demonstrates a practical method for building internationalized applications.