How to get current language with react-i18next and JavaScript?

To get current language with react-i18next, we can inject the i18n prop into our component with the withTranslation higher order component.

For instance, we write:

import React from "react";
import i18n from "i18next";
import { withTranslation, initReactI18next } from "react-i18next";

i18n.use(initReactI18next).init({
  resources: {
    en: {
      translation: {
        "Welcome to React": "Welcome to React and react-i18next"
      }
    }
  },
  lng: "en",
  fallbackLng: "en",
  interpolation: {
    escapeValue: false
  }
});

const HomeComponent = ({ i18n }) => {
  return <div>{i18n.language}</div>;
};

const Home = withTranslation()(HomeComponent);

export default function App() {
  return (
    <div>
      <Home />
    </div>
  );
}

We initialize react-i18next with:

i18n.use(initReactI18next).init({
  resources: {
    en: {
      translation: {
        "Welcome to React": "Welcome to React and react-i18next"
      }
    }
  },
  lng: "en",
  fallbackLng: "en",
  interpolation: {
    escapeValue: false
  }
});

Next, we create the HomeComponent that takes the i18n prop.

And we get the current language with the i18n.language property.

Next, we call the withTranslation HOC with HomeComponent to return a new component with the i18n prop set.

Finally, we render Home in App.