Localising Flutter applications and automating the localisation process

Developing a small application or PoC in one language is acceptable, but as soon as you release an app to the public you might want to consider localising it first. I live in Belgium, a country best known for its chocolate, waffles, fries and beer. We have three official languages: Dutch, French and German. We also have English as an unofficial language. If I want to publish an app and I want as many Belgians as possible to be able to use it, it’ll definitely need to support these languages.

The more languages and locales your application supports, the bigger your target audience will be.

In this article I will guide you through localising your Flutter application using .arb (Application Resource Bundle) files and the Intl package. I will also show you how you can automatically provide your app with the latest translations using the Loco tool. I’ve written a shell script that can be run locally or used by a CI/CD tool of choice. I’ll be using Codemagic because it’s easy to set up and visualise.

Adding the dependencies to the project

Before you can localise your Flutter app, you’ll first need to add some dependencies to the pubspec.yaml file of your project.

    sdk: flutter

    sdk: flutter

    sdk: flutter

  intl_translation: ^0.17.7

Localisation in the MaterialApp

Most of the setup for the localisation happens in the MaterialApp, which is the heart of your Flutter app. It doesn’t necessarily have to be a MaterialApp though, it can also be a CupertinoApp or a WidgetsApp. This is the place where the supported locales are defined and is decided which locale is going to be used in the app. It’s also where we’ll add our own localisations delegate, which is where the rest of the magic happens.

class MyApp extends StatelessWidget {
  Widget build(BuildContext context) {
    return MaterialApp(
      title: 'Localisation Demo';
      theme: ThemeData(
        primarySwatch: Colors.blue,
      home: HelloWorld(),
      // List of all supported locales (language code followed by country code).
      // For this example, I'll be using Belgian English, Belgian Dutch and Belgian French.
      // The order of the supported locales is very important because a fallback mechanism is used.
      supportedLocales: const [
        Locale('en', 'BE'),
        Locale('nl', 'BE'),
        Locale('fr', 'BE'),
      // These delegates are responsible for loading the translations of the selected locale.
      localizationsDelegates: [
        // This is where all translations are defined, will be added later.
        const AppLocalizationsDelegate(),
        // Built-in delegate for the localisation of the Material widgets (e.g. tooltips).
        // Built-in localisation for text direction (left-to-right or right-to-left).
      // This is where it's decided which locale should be used.
      localeResolutionCallback: (Locale locale, Iterable<Locale> supportedLocales) {
        for (final supportedLocale in supportedLocales) {
          // The language of the device of the user is compared to every supported language.
          // If the language codes match, the supported locale with that language code is chosen.
          // This allows users using American English or British English as locales
          // to be able to use the Belgian English localisation.
          if (locale.languageCode == supportedLocale.languageCode) {
            return supportedLocale;

        // If the language of the user isn't supported, the default locale should be used.
        return supportedLocales.first;

Creating the AppLocalizations class and the AppLocalizationsDelegate

The AppLocalizations class contains the logic to load the messages (= translations) of a given locale. It’s also where you’ll define all Intl messages that will be used in the app. All messages should be in the same language, the language of the ‘source locale’ of your project. In this case it’s Belgian English.

I’ve created two Intl messages: one for the app title and one for a ‘hello world’ message that we’ll use later in the UI.

class AppLocalizations {
  static Future<AppLocalizations> load(Locale locale) {
    final String name = locale.countryCode == null || locale.countryCode.isEmpty
      ? locale.languageCode
      : locale.toString();
    final String localeName = Intl.canonicalizedLocale(name);

    return initializeMessages(localeName).then((_) {
      Intl.defaultLocale = localeName;
      return AppLocalizations();

  // Localizations are usually accessed using the InheritedWidget "of" syntax.
  static AppLocalizations of(BuildContext context) {
    return Localizations.of<AppLocalizations>(context, AppLocalizations);

  // Messages which contain a string in the default language of your app and a name as identifier.
  // CamelCasing is required for the name of the Intl message.
  String get appTitle => Intl.message('Localisation Demo', name: 'appTitle');
  String get helloWorld => Intl.message('Hello world!', name: 'helloWorld');

The AppLocalizationsDelegate is the glue between the AppLocalizations class and the MaterialApp. The load function returns an AppLocalizations object as it contains all localised messages. The isSupported function can be used to check if a certain locale (or in this case language code) is supported.

class AppLocalizationsDelegate extends LocalizationsDelegate<AppLocalizations> {
  // As the instance of this delegate will never change, it can have a const constructor.
  const AppLocalizationsDelegate();

  // Checks whether or not a certain locale (or language code in this cast) is supported.
  // The order of the locales doesn't matter in this case.
  bool isSupported(Locale locale) => ['en', 'nl', 'fr'].contains(locale.languageCode);

  // Load the translations of a certain locale.
  Future<AppLocalizations> load(Locale locale) => AppLocalizations.load(locale);

  // Defines whether or not all the app’s widgets should be reloaded when the load method is completed.
  bool shouldReload(LocalizationsDelegate<AppLocalizations> old) => false;

If you copy/paste this code you’ll get an error on the initializeMessages method, as it’s not defined yet. This method will be generated later by the Intl package. Before you can start providing translations to your Flutter app, you first need to create a Loco project.


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Localising Flutter applications and automating the localisation process

Google's Flutter 1.20 stable announced with new features - Navoki

Flutter Google cross-platform UI framework has released a new version 1.20 stable.

Flutter is Google’s UI framework to make apps for Android, iOS, Web, Windows, Mac, Linux, and Fuchsia OS. Since the last 2 years, the flutter Framework has already achieved popularity among mobile developers to develop Android and iOS apps. In the last few releases, Flutter also added the support of making web applications and desktop applications.

Last month they introduced the support of the Linux desktop app that can be distributed through Canonical Snap Store(Snapcraft), this enables the developers to publish there Linux desktop app for their users and publish on Snap Store.  If you want to learn how to Publish Flutter Desktop app in Snap Store that here is the tutorial.

Flutter 1.20 Framework is built on Google’s made Dart programming language that is a cross-platform language providing native performance, new UI widgets, and other more features for the developer usage.

Here are the few key points of this release:

Performance improvements for Flutter and Dart

In this release, they have got multiple performance improvements in the Dart language itself. A new improvement is to reduce the app size in the release versions of the app. Another performance improvement is to reduce junk in the display of app animation by using the warm-up phase.


If your app is junk information during the first run then the Skia Shading Language shader provides for pre-compilation as part of your app’s build. This can speed it up by more than 2x.

Added a better support of mouse cursors for web and desktop flutter app,. Now many widgets will show cursor on top of them or you can specify the type of supported cursor you want.

Autofill for mobile text fields

Autofill was already supported in native applications now its been added to the Flutter SDK. Now prefilled information stored by your OS can be used for autofill in the application. This feature will be available soon on the flutter web.


A new widget for interaction

InteractiveViewer is a new widget design for common interactions in your app like pan, zoom drag and drop for resizing the widget. Informations on this you can check more on this API documentation where you can try this widget on the DartPad. In this release, drag-drop has more features added like you can know precisely where the drop happened and get the position.

Updated Material Slider, RangeSlider, TimePicker, and DatePicker

In this new release, there are many pre-existing widgets that were updated to match the latest material guidelines, these updates include better interaction with Slider and RangeSliderDatePicker with support for date range and time picker with the new style.


New pubspec.yaml format

Other than these widget updates there is some update within the project also like in pubspec.yaml file format. If you are a flutter plugin publisher then your old pubspec.yaml  is no longer supported to publish a plugin as the older format does not specify for which platform plugin you are making. All existing plugin will continue to work with flutter apps but you should make a plugin update as soon as possible.

Preview of embedded Dart DevTools in Visual Studio Code

Visual Studio code flutter extension got an update in this release. You get a preview of new features where you can analyze that Dev tools in your coding workspace. Enable this feature in your vs code by _dart.previewEmbeddedDevTools_setting. Dart DevTools menu you can choose your favorite page embed on your code workspace.

Network tracking

The updated the Dev tools comes with the network page that enables network profiling. You can track the timings and other information like status and content type of your** network calls** within your app. You can also monitor gRPC traffic.

Generate type-safe platform channels for platform interop

Pigeon is a command-line tool that will generate types of safe platform channels without adding additional dependencies. With this instead of manually matching method strings on platform channel and serializing arguments, you can invoke native class and pass nonprimitive data objects by directly calling the Dartmethod.

There is still a long list of updates in the new version of Flutter 1.2 that we cannot cover in this blog. You can get more details you can visit the official site to know more. Also, you can subscribe to the Navoki newsletter to get updates on these features and upcoming new updates and lessons. In upcoming new versions, we might see more new features and improvements.

You can get more free Flutter tutorials you can follow these courses:

#dart #developers #flutter #app developed #dart devtools in visual studio code #firebase local emulator suite in flutter #flutter autofill #flutter date picker #flutter desktop linux app build and publish on snapcraft store #flutter pigeon #flutter range slider #flutter slider #flutter time picker #flutter tutorial #flutter widget #google flutter #linux #navoki #pubspec format #setup flutter desktop on windows

Terry  Tremblay

Terry Tremblay


What is Flutter and why you should learn it?

Flutter is an open-source UI toolkit for mobile developers, so they can use it to build native-looking** Android and iOS** applications from the same code base for both platforms. Flutter is also working to make Flutter apps for Web, PWA (progressive Web-App) and Desktop platform (Windows,macOS,Linux).


Flutter was officially released in December 2018. Since then, it has gone a much stronger flutter community.

There has been much increase in flutter developers, flutter packages, youtube tutorials, blogs, flutter examples apps, official and private events, and more. Flutter is now on top software repos based and trending on GitHub.

Flutter meaning?

What is Flutter? this question comes to many new developer’s mind.


Flutter means flying wings quickly, and lightly but obviously, this doesn’t apply in our SDK.

So Flutter was one of the companies that were acquired by **Google **for around $40 million. That company was based on providing gesture detection and recognition from a standard webcam. But later when the Flutter was going to release in alpha version for developer it’s name was Sky, but since Google already owned Flutter name, so they rename it to Flutter.

Where Flutter is used?

Flutter is used in many startup companies nowadays, and even some MNCs are also adopting Flutter as a mobile development framework. Many top famous companies are using their apps in Flutter. Some of them here are





Reflectly app

Reflectly app

Abbey Road Studios

Abbey Road Studios

and many more other apps. Mobile development companies also adopted Flutter as a service for their clients. Even I was one of them who developed flutter apps as a freelancer and later as an IT company for mobile apps.

Flutter as a service

#dart #flutter #uncategorized #flutter framework #flutter jobs #flutter language #flutter meaning #flutter meaning in hindi #google flutter #how does flutter work #what is flutter

Punith Raaj


The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2

The Ultimate Guide To Tik Tok Clone App With Firebase - Ep 2
In this video, I'm going to show you how to make a Cool Tik Tok App a new Instagram using Flutter,firebase and visual studio code.

In this tutorial, you will learn how to Upload a Profile Pic to Firestore Data Storage.

🚀 Nice, clean and modern TikTok Clone #App #UI made in #Flutter⚠️

Starter Project : https://github.com/Punithraaj/Flutter_Tik_Tok_Clone_App/tree/Episode1

► Timestamps 
0:00 Intro 0:20 
Upload Profile Screen 
16:35 Image Picker
20:06 Image Cropper 
24:25 Firestore Data Storage Configuration.

⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub.

► Social Media 
GitHub: https://github.com/Punithraaj/Flutter_Tik_Tok_Clone_App.git
LinkedIn: https://www.linkedin.com/in/roaring-r...
Twitter: https://twitter.com/roaringraaj
Facebook: https://www.facebook.com/flutterdartacademy

► Previous Episode : https://youtu.be/QnL3fr-XpC4
► Playlist: https://youtube.com/playlist?list=PL6vcAuTKAaYe_9KQRsxTsFFSx78g1OluK

I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub!
⭐️ Thanks for watching the video and for more updates don't forget to click on the notification. 
⭐️Please comment your suggestion for my improvement. 
⭐️Remember to like, subscribe, share this video, and star the repo on Github :)

Hope you enjoyed this video!
If you loved it, you can Buy me a coffee : https://www.buymeacoffee.com/roaringraaj

LIKE & SHARE & ACTIVATE THE BELL Thanks For Watching :-)

#flutter tutorial - tiktok clone with firebase #flutter challenge @tiktokclone #fluttertutorial firebase #flutter firebase #flutter pageview #morioh #flutter

Punith Raaj


Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1

Flutter Hotel Booking UI - Book your Stay At A New Hotel With Flutter - Ep1
#flutter #fluttertravelapp #hotelbookingui #flutter ui design 

In this video, I'm going to show you how to make a Cool Hotel Booking App using Flutter and visual studio code. 

In this tutorial, you will learn how to create a Splash Screen and Introduction Screen, how to implement a SmoothPageIndicator in Flutter. 

🚀 Nice, clean and modern Hotel Booking #App #UI made in #Flutter 

⚠️ IMPORTANT: If you want to learn, I strongly advise you to watch the video at a slow speed and try to follow the code and understand what is done, without having to copy the code, and then download it from GitHub. 

► Social Media 

    GitHub: https://github.com/Punithraaj 

    LinkedIn: https://www.linkedin.com/in/roaring-r...

    Twitter: https://twitter.com/roaringraaj

    Facebook: https://www.facebook.com/flutterdartacademy

I hope you liked it, and don't forget to like,comment, subscribe, share this video with your friends, and star the repository on GitHub! 

⭐️ Thanks for watching the video and for more updates don't forget to click on the notification.⭐️Please comment your suggestion for my improvement. ⭐️Remember to like, subscribe, share this video, and star the repo on Github :)Hope you enjoyed this video! If you loved it, you can Buy me a coffee : https://www.buymeacoffee.com/roaringraaj

#flutter riverpod #flutter travel app #appointment app flutter #morioh

Adobe XD plugin for Flutter with CodePen Tutorial

Recently Adobe XD releases a new version of the plugin that you can use to export designs directly into flutter widgets or screens. Yes, you read it right, now you can make and export your favorite design in Adobe XD and export all the design in the widget form or as a full-screen design, this can save you a lot of time required in designing.

What we will do?
I will make a simple design of a dialogue box with a card design with text over it as shown below. After you complete this exercise you can experiment with the UI. You can make your own components or import UI kits available with the Adobe XD.

#developers #flutter #adobe xd design export to flutter #adobe xd flutter code #adobe xd flutter code generator - plugin #adobe xd flutter plugin #adobe xd flutter plugin tutorial #adobe xd plugins #adobe xd to flutter #adobe xd tutorial #codepen for flutter.