How to switch languages with the i18next plugin?

Question

I am using Backbone.js in my application and the i18next plugin for my language switch function on my application. When I pass a value to the lng option in the init function call, then it translates my page correctly.

Now I want to do this dynamically via a language selector. I have a <select> of four languages and I want to pass the value of the selected language to the lng option of the init function.

Here is my code:

HTML

<div class="col-xs-6>
    <select class="form-control language-selector">
        <option value="de">Deutsch</option>
        <option value="en">English</option>
        <option value="fr">Français</option>
        <option value="it">Italiano</option>
    </select>
</div>

JavaScript

i18next.init({
        debug: true,
        languages: ['de','en','fr','it'],
        lng: 'de',  
        fallbackLng: false,
        load: 'current',
        resources: resBundle
    }, function(err, t){

});

'change .language-selector': function(e){
    e.preventDefault();
    i18next.setLng($(e.target).val(), (err, t) => {
        console.log(arguments);
        this.render();
    });
}

Answer 1

$(document).ready(function () {
    i18n.init({
        "lng": 'en',
        "resStore": resources,
        "fallbackLng" : 'en'
    }, function (t) {
        $(document).i18n();
    });

   'change .language-selector': function(e){
        e.preventDefault();
        i18n.init({
        lng: $(e.target).val()}, (err, t) => {
            console.log(arguments);
            $(document).i18n();
        });
   }
}

I dunno backbone.js. Working solution in normal JavaScript is here