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Internationalization (i18n)

This documents describes how i18n works in Bob Wallet, and how to add support for a new language

Overview

All locale strings are saved as {locale}.json based on result return from electron.app.getLocale().

A locale json looks like this:

en.json

{
  "hello": "Hello, %s!"
}

On app starts, all locale strings are compiled into a JSON object, and injected to the app using React Context.

Usage Example:

import {I18nContext} from "../../utils/i18n";

class Example extends Component { 
    static contextType = I18nContext;

    render() {
        const {t} = this.context;
        
        // This will render "Hello, World!" based on en.json above
        return (
            <div>{t('hello', 'World')}</div>
        );     
    } 
}

When getting string using the injected this.context.t(localeKey) function, the app will:

  • first check to see if there is a matching string for localeKey from the exact locale (e.g. en-US.json)
  • if a matching string cannot be found, it will check to see if there is matching string for localeKey from the root locale (e.g. en-US.json -> en.json)
  • if a match is still not found, it will use en.json by default
  • if localeKey is not found in en.json, it will render this.context.t(localeKey) in the UI;

Adding Support for New Language

  1. Copy /locales/en.json to a new file, and save it as [locale].json. For example, if you are adding support for Spanish, the file name should be es.json. You can find all valid locale strings here.
  2. Start translating 📙
  3. When finished translating, save your file
  4. Go to https://github.com/kyokan/bob-wallet/tree/master/locales
  5. Click Add Files -> Uplaod Files
  6. Drag and drop your file to upload it to GitHub
  7. Make sure you select Create a new branch for this commit and start a pull request.
  8. Click Propose Change

Adding New Keys to Existing JSON

As new copies are added to Bob Wallet, new keys will be added to en.json. There is a npm script added to help extend new key to existing locale json.

The following script will extend zh.json with any new keys from en.json without overwritting existing translations.

npm run add-locale zh

Testing New Translation

  1. Go to Setting -> General
  2. From the language dropdown, select Custom JSON
  3. Upload your translation json file

Note to Maintainers

  • When merging in a new locale json, be sure to update the dropdown list in app/util/i18n.js with the new locale.
  • When new keys are added to en.json, make sure to run npm run add-locale to extend new keys to existing locale json.

Languages

Language Filename Contributors
Catalan ca.json Faltrum (@faltrum)
Spanish es-ES.json Faltrum (@faltrum)
French fr-FR.json Miguel Gargallo (@miguelgargallo)