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Localize your React.js App the simplest way you've ever seen

Jan Cizmar's photo
Jan Cizmar
Β·Dec 10, 2021Β·

4 min read

Translating an App to multiple languages (localization) is tricky part of many applications. Tolgee is simplifying the localization process and saves developer's time πŸ‘¨β€πŸ’»πŸ‘©πŸ»β€πŸ’» by removing repetitive tasks πŸ” ❌. Saving time? That's what I want. Show me!

What is Tolgee

Tolgee is open-source tool combining localization platform and SDKs to provide simple way to translate the web applications for both developers and translators. πŸ‘¨β€πŸ’»πŸ‘©πŸ»β€πŸ’»πŸ§–πŸΌπŸ‘©πŸ»β€πŸ’»πŸ§–πŸΌ

In context translating πŸ“–

As a developer of localized application, you probably have to modify localization data every time you need to change a text. So you have to open the file, add or find the key to modify, save it and check whether everything was changed correctly in the app. With Tolgee you can just ALT + click the actual translated text in your app and πŸ’₯boomπŸ’₯ translation dialog appears and you are able to translate it right away.

Tolgee - in context translation dialog

Automatic Screenshot Generation πŸ“Έ

Another tricky part of localization is providing context πŸ“– to translators. Only exporting the keys and translations in source language is not always enough. Tolgee enables you to take and upload screenshot directly in the in-context translation dialog. So no more manual taking and uploading screenshots.πŸŒ„

Localization platform included βœ…

Tolgee is also localization platform, where you can manage all your localization strings πŸ“š. So you can provide access to translators and they can translate the texts there. If you uploaded screenshots before, they know the context of the translations perfectly so they can produce perfect results.

Isn't that hard to integrate? No it's not!

To get started, you can simply follow the integration guides provided in the platform. Which is the simplest way to get started.

  1. Login to Tolgee Cloud or use your self hosted Tolgee instance.

  2. Create a new project by clicking Add button in the top right. And filling the project name.

    Add button

    Optionally, you can add multiple languages to translate your app into.

  3. Select Integrate from side menu, choose React and generate an API key with all scopes checked.

    Add button

  4. Success! πŸŽ‰ Now you just have to follow the integration guide.

Let's integrate it into CRA App

  1. Generate brand new CRA App and open it your favorite editor

```npx create-react-app tolgee-hello-world

2. Install Tolgee packages ⬇️

```npm install @tolgee/react @tolgee/ui --save
  1. Add Tolgee properties to you development .env file env.development.local by copying it from the integration guide
  1. Wrap your App component in index.js with TolgeeProvider component. Again, you can copy it from the integration guide.

  2. Go to App.js and replace all the crap with simple "Hello world!" message.

     import './App.css';
     function App() {
       return (
        <div className="App">
          <h1>Hello world!</h1>
     export default App;
  1. Wrap the "Hello world!" with <T> component and add keyName prop.

     import './App.css';
     import { T } from '@tolgee/react'
     function App() {
       return (
         <div className="App">
           <h1><T keyName="hello_world">Hello world!</T></h1>
     export default App;
  2. Let's run the App in the browser and see the magic! πŸͺ„ Hold your ALT key and move your mouse over the text. It should be highlighted. When you click it, dialog opens and you're able to edit the text ✏️ or generate screenshots. πŸ“·

    In-context translation of hello_world key After you hit the update button, your Hello World! text will be immediately changed to the new value!

    The result

Congratulations! You're done! πŸŽ‰πŸŽ‰πŸŽ‰

You can find the resulting code in this GitHub repo, but you have to add your .env.development.local file.

Now you are able to translate your Applications with Tolgee. To learn more about Tolgee or to find out how to translate more complicated cases, visit our docs.


Tolgee is open-source tool simplifying the process of web based application. It has this features:

  • It's open-source
  • You can translate in the context of your App
  • You can generate screenshots automatically
  • You should use it and save time!

    πŸ™πŸ™πŸ™ If you like what we do, please star our GitHub projects. πŸ™πŸ™πŸ™