improve example fallback translation and add new sample locale for lang id (#1983)

examples/with-i18next/components/Title.js

 import { translate } from 'react-i18next'
-export default translate(['common'])((props) => (<h1>{props.t('hello')}</h1>))
+export default translate(['common'])((props) => (<h1>{props.t('hello')}, {props.t('morning')}</h1>))

examples/with-i18next/pages/index.js

@@ -4,9 +4,12 @@ import startI18n from '../tools/startI18n'
 import { getTranslation } from '../tools/translationHelpers'
 import Title from '../components/Title'
 
+// get language from query parameter or url path
+const lang = 'id'
+
 export default class Homepage extends Component {
   static async getInitialProps () {
-    const translations = await getTranslation('pt', 'common', 'http://localhost:3000/static/locales/')
+    const translations = await getTranslation(lang, 'common', 'http://localhost:3000/static/locales/')
 
     return { translations }
   }
@@ -14,7 +17,7 @@ export default class Homepage extends Component {
   constructor (props) {
     super(props)
 
-    this.i18n = startI18n(props.translations)
+    this.i18n = startI18n(props.translations, lang)
   }
 
   render (props) {

examples/with-i18next/static/locales/id/common.json

+{
+  "hello": "halo"
+}
\ No newline at end of file

examples/with-i18next/static/locales/pt/common.json

 {
-  "hello": "e ae tche"
+  "hello": "e ae tche",
+  "morning": "manha"
 }
\ No newline at end of file

examples/with-i18next/tools/startI18n.js

 import i18n from 'i18next'
 
-const startI18n = file => i18n.init({
+const startI18n = (file, lang) => i18n.init({
+  lng: lang, // active language http://i18next.com/translate/
   fallbackLng: 'pt',
   resources: file,
   ns: ['common'],