SO:http://stackoverflow.com/questions/42489874/how-can-i-translate-routes-in-ember-cli

controllers.application.js

import Ember from 'ember';

export default Ember.Controller.extend({
  appName: 'Ember Twiddle',
  
  i18n: Ember.inject.service(),  

  locale: Ember.computed.readOnly('i18n.locale'),
  
  path: Ember.computed('locale', function() {
    return {
      path: this.get('i18n').t(this.get('router').get('currentRouteName'))
    };
  }),
  actions: {
    changeLang(lang){
      this.set('i18n.locale', lang);
      const router = Ember.getOwner(this).lookup('router:main');
      let currRoute = router.get('currentRouteName');      
      if(/^lang./.test(currRoute)){
        this.replaceRoute(currRoute, lang, this.get('path'));
      }
    }
  }
});

helpers.route-param.js

import Ember from 'ember';

export function routeParam(params/*, hash*/) {
  let ret = {};
  ret[params[0] + '_path'] = params[1].path;
  return ret;
}

export default Ember.Helper.helper(routeParam);

initializers.i18n.js

export function initialize(application) {
  application.inject('route', 'i18n', 'service:i18n');
}

export default {
  name: 'i18n',
  initialize
};

initializers.router.js

export function initialize(application) {
  application.inject('controller', 'router', 'router:main');
}

export default {
  name: 'router-injector',
  initialize: initialize
};

locales.en.config.js

export default {};

locales.en.translations.js

export default {
  "routes": {
    "home": "home",
    "about": "about",
    "contact": "contact"
  }
};

locales.es.config.js

export default {};

locales.es.translations.js

export default {
  "routes": {
    "home": "pagina-de-inicio",
    "about": "about",
    "contact": "contacto"
  }
};

locales.fa.config.js

export default {};

locales.pt-br.config.js

export default {};

locales.pt-br.translations.js

export default {
  "routes": {
    "home": "pagina-inicial",
    "about": "sobre",
    "contact": "contato"
  }
};

router.js

import Ember from 'ember';
import config from './config/environment';

const Router = Ember.Router.extend({
  location: config.locationType,
  rootURL: config.rootURL
});

Router.map(function() {
  this.route("lang", {path: '/:lang'}, function() {
    this.route('home', {path: ':home_path', template: 'home'});
    this.route('about', {path: ':about_path', template: 'about'});
    this.route('contact', {path: ':contact_path', template: 'contact'});
  });
});

export default Router;

routes.index.js

import Ember from 'ember';

export default Ember.Route.extend({
  beforeModel: function () {
    this.set(
      'i18n.locale',
      'en'
    );
    //this.transitionTo('lang', { lang: 'es' });
  }
});

routes.lang.about.js

import Ember from 'ember';

export default Ember.Route.extend({
});

routes.lang.contact.js

import Ember from 'ember';

export default Ember.Route.extend({
});

routes.lang.home.js

import Ember from 'ember';

export default Ember.Route.extend({
});

routes.lang.js

import Ember from 'ember';

export default Ember.Route.extend({
 
});

templates.application.hbs

<h1>Welcome to {{appName}}</h1>
<br>
<br>
<button {{action "changeLang" "en"}}>EN</button>
<button {{action "changeLang" "es"}}>ES</button>
<button {{action "changeLang" "pt-br"}}>PT-BR</button>
<br>
<br>
<br>
{{outlet}}
<br>
<p>Current locale: <b>{{locale}}</b></p>
{{#link-to "lang.home" locale (route-param "home" path)}}{{t "routes.home"}}{{/link-to}}
{{#link-to "lang.about" locale (route-param "about" path)}}{{t "routes.about"}}{{/link-to}}
{{#link-to "lang.contact" locale (route-param "contact" path)}}{{t "routes.contact"}}{{/link-to}}
<br>

twiddle.json

{
  "version": "0.11.0",
  "EmberENV": {
    "FEATURES": {}
  },
  "options": {
    "use_pods": false,
    "enable-testing": false
  },
  "dependencies": {
    "jquery": "https://cdnjs.cloudflare.com/ajax/libs/jquery/1.11.3/jquery.js",
    "ember": "2.10.2",
    "ember-data": "2.11.0",
    "ember-template-compiler": "2.10.2",
    "ember-testing": "2.10.2"
  },
  "addons": {
  "ember-i18n": "5.0.0"
  }
}