This tutorial guides you through the process of building a multilingual email app using SendGrid and Amazon Translate. The application generates translation files for different languages, creates dynamic email templates with placeholders that match the keys in the JSON files, and sends emails to users based on their preferred language. To set up the project, you need to create an AWS account, install required packages, generate translation files, initialize i18next library, set up SendGrid template, build the email-sending functionality, and test and troubleshoot the application. The tutorial provides a solid foundation for building a multilingual email system and can be extended to integrate with databases or other data sources.