Are you ready to take your Angular application to a global audience? Expanding your reach to new countries and languages is one of the biggest opportunities for any SaaS company. But before you can welcome customers from around the world, your app’s code needs to be prepared.
This preparation is called internationalization, or i18n. Simply put, it’s the process of making your app’s code flexible enough to handle different languages and regions. Think of it less as a chore and more as setting up the wiring for future growth. It’s the essential first step before you even start the actual translation, a process known as localization (l10n).
In this article, we’ll break down the basics of Angular i18n and show you how to get started doing it right (without hardcoding).
Getting Your Code Ready for Translation
Before you start adding any code, take a moment to consider these three essential points. Having a clear checklist will save you from major headaches down the line.
Stop Hard-Coding Text
This is the most critical rule of internationalization. All user-facing text (like button labels, headings, and error messages) must be separated from your main code. When you hard-code text directly into your HTML templates, you create a rigid dependency. To support a new language, you would have to duplicate and edit that code, creating a maintenance nightmare.
The correct approach is to replace the text with keys (e.g., login_button, error_message). These keys will then dynamically fetch the appropriate translation from a separate file, allowing you to manage all languages from a central location without changing your application’s logic.
Flexible Layouts
Languages take up different amounts of space. For example, a single word in German can be much longer than its English equivalent. Your app’s design must be flexible enough to accommodate this without breaking. If your buttons and text fields have fixed widths, the longer German text might get cut off or mess up the surrounding elements. When designing your UI, always assume the text will grow and shrink.
Local Formats: Internationalization
I18n isn’t just about translating words; it’s also about adapting to local conventions. Dates, times, numbers, and currencies are displayed differently around the world. For instance, the date “06/12/2025” is read as December 6th in many parts of the world, but as June 12th in the U.S. Your application needs to be set up to handle these formats automatically, so users see information in a way that’s familiar and clear to them.
The Preparation Process:
With your prerequisites in mind, it’s time to get your hands dirty. These are the three core steps to begin your Angular internationalization journey.
Choose a Library
An i18n library is the “toolkit” that handles the complexity of internationalization for you. For Angular, you have two primary options:
@angular/localize is a built-in package, and @ngx-translate is a popular third-party alternative.
For a beginner, the built-in option is a great place to start, as it’s simple, well-documented, and tightly integrated with the Angular framework. A third-party library might offer more features, but it will also require a bit more setup.
Mark Your Text for Translation
This is the first practical coding step. You must tell Angular which parts of your templates need to be translated. You do this by adding the special i18n attribute to any HTML element containing user-facing text.
For example, you would change <h1>Welcome</h1> to <h1 i18n>Welcome</h1>. This simple attribute acts as a signal to the framework, letting it know that the content inside should be considered for translation.
Extract the Text
Once you’ve marked all the translatable strings in your templates, the final step in the preparation phase is to extract them. Angular provides a powerful command-line tool for this purpose: ng extract-i18n. When you run this command, it automatically scans your project and pulls all the text you’ve marked into a single, structured file. This file, usually named messages.xlf, is the key outcome of this process. It’s the central repository that will be used by your translators or a translation management tool to provide the translated text for each language.
From Preparation to Automation: Introducing Crowdin
You’ve now successfully prepared your Angular app for translation. Now you have a file full of keys and values, and you need to get it to your translators (or even to an AI) and get the translations back into your project.
This is where the manual process can quickly become a nightmare. Managing these files, tracking changes, and coordinating with translators can add overhead to your development workflow.
This is the problem that Crowdin’s localization software solves.
Think of Crowdin as a central hub for all your translations. It connects directly to your code repository (like GitHub or GitLab) and automatically pulls in the source strings you just extracted. It then provides a dedicated environment for your translators to work, or you can choose to translate with AI for immediate results. Once a translation is complete, Crowdin automatically pushes the finished files back into your project.
This automation means you don’t have to manually send files back and forth or worry about keeping everything in sync. It’s a “set it and forget it” solution that lets you focus on building features while the translations are handled in the background. Crowdin turns a complex, multi-step process into a smooth, hands-off workflow.
Wrapping up
By understanding these steps, you are well on your way to preparing your Angular app for a global audience. The process of Angular internationalization might seem complex, but it’s a critical investment that will save you time and headaches down the road.
When you separate your text from your code and use a translation management tool like Crowdin, you’re not just translating strings – you’re building a scalable system. This approach allows you to automate the entire translation workflow, freeing you up to focus on what you do best: building great features.
