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Localization

Kepler.gl supports localization through react-intl. Locale is determined by uiState.locale value. Current supported languages are:

locale code Language Default?
en English default
fi Finnish
pt Portuguese
ca Catalan
es Spanish
ja Japanese
cn Chinese
ru Русский

Changing default language

By default the first language is English en. The default language can be changed by giving locale value to uiState:

import {combineReducers} from 'redux';
import keplerGlReducer from 'kepler.gl/reducers';
import {LOCALE_CODES} from 'kepler.gl/localization';

const customizedKeplerGlReducer = keplerGlReducer.initialState({
  uiState: {
    // use Finnish locale
    locale: LOCALE_CODES.fi
  }
});

const reducers = combineReducers({
  keplerGl: customizedKeplerGlReducer,
  app: appReducer
});

Adding new language

Let's say we want to add the Swedish language to kepler.gl. Easiest way to add translation of new language is to follow these 3 steps:

  • Find out the language code for Swedish: sv

  • Add new translation file src/localization/translations/sv.js by copying src/localization/translations/en.js and translating the strings

  • Update LOCALES in src/localization/locales.js to include new language translation:

    export const LOCALES = {
      en : 'English',
      fi : 'Suomi',
      pt: 'Português',
      // add Swedish language
      sv: 'Svenska'
    }

Modify default translation or add new translation

the localeMessages prop of KeplerGl takes additional translations and merge with default translation.

Example 1. Update default translation

To update the english translation of layerManager.addData, pass localeMessages like this.

const localeMessages = {
  en: {
    ['layerManager.addData']: 'Add Data to Layer'
  }
};

const App = () => (
    <KeplerGl 
      id="map"
      localeMessages={messages}
      mapboxApiAccessToken={Token}
    />
);

Example 2. Pass additional translation

Sometimes together with dependency injection, you might need to add additional translations to the customized component. For example, adding an additional settings panel in the side panel, you will need to provide a translation for the panel name assigned to sidebar.panels.settings

const localeMessages = {
  en: {
    ['sidebar.panels.settings']: 'Settings'
  }
};

const App = () => (
    <KeplerGl 
      id="map"
      localeMessages={messages}
      mapboxApiAccessToken={Token}
    />
);