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              	<body>
		  <div>
		    	<div>
				      <ul class="lang-picker">
					        <li id="portuguese">português</li>
					        <li id="english">english</li>
					        <li id="spanish">español</li>
				      </ul>
			    </div>
			    <h1 data-i18n="demo.title"></h1>
			    <p data-i18n="demo.text"></p>
			    <form>
				      <input type="text" data-i18n-placeholder="demo.form.name">
				      <input type="text" data-i18n-placeholder="demo.form.email">
				      <input type="submit" data-i18n-value="demo.form.submit">
			    </form>
		  </div>
	</body>
            
          
!
            
              
html {
	background-color: #2f2f2f;
}

body {
	width: 35rem;
	margin: 10rem auto 0 auto;
	background-color: #f0f0f0;
	border-radius: 10px;
}

body > div:first-of-type {
	width: 25rem;
	margin: 0 auto;
}

.lang-picker {
	padding: 2rem 0 0 0;
	text-align: center;
}

.lang-picker li {
	list-style: none;
	display: inline-block;
	font: 400 14px/20px sans-serif;
	color: #393939;
	cursor: pointer;
}

.lang-picker li.selected {
	font-weight: 900;
	color: #496992;
}

h1 {
	font: 400 28px/48px sans-serif;
	color: #393939;
	
}

p {
	font: 400 18px/22px sans-serif;
	color: #393939;
}

form {
	padding-bottom: 2rem;
}

form input{
	display: block;
	margin: 8px 0;
	font: 400 13px sans-serif;
}

form input[type="text"] {
	padding: 4px 8px;
	width: 15rem;
}

form input[type="submit"] {
	font: 100 15px sans-serif;
	padding: 8px 16px;
	color: #f0f0f0;
	background-color: #496992;
	border: none;
}
            
          
!
            
              /*
 *  I18n.js
 *  =======
 *
 *  Simple localization util.
 *  1. Store your localized labels in json format: `localized-content.json`
 *  2. Write your markup with key references using `data-i18n` attributes.
 *  3. Explicitly invoke a traverse key resolver: `i18n.localize()`
 *     OR
 *     Change the language, and the contents will be refreshed: `i18n.lang('en')`
 *
 *  This util relies on jQuery to work. I would recommend using the latest version
 *  available (1.12.x or 2.1.4+), although this will probably run with any older
 *  version since it is only taking advantage of `$.getJSON()` and the jQuery
 *  selector function `$()`.
 * 
 *  © 2016 Diogo Simões - diogosimoes.com
 *
 */

 var demoJson = {
	"demo": {
		"title": {
			"pt": "Exemplo de uso do i18n.js",
			"en": "Simple demo for i18n.js",
			"es": "¡Una cerveza por favor!"
		},
		"text": {
			"pt": "Este exemplo serve apenas para ilustrar os diferentes tipos de atributos de texto que podem ser localizados no cliente com a ajuda do i18n.js",
			"en": "This demo's only purpose is to show the different text attributes that can be localized with the help of i18n.js",
			"es": "Si i18n.js era español entonces sería de puta madre. Ahora así, la han cagado!"
		},
		"form": {
			"name": {
				"pt": "Zé dos Anzóis",
				"en": "John Doe",
				"es": "Fulano de Tal"
			},
			"email": {
				"pt": "zeanzois@email.org",
				"en": "johndoe@email.org",
				"es": "fulanotal@email.org"
			},
			"submit": {
				"pt": "Enviar",
				"en": "Send",
				"es": "¡Tío!"
			}
		}
	}
};

(function () {
	this.I18n = function (defaultLang) {
		var lang = defaultLang || 'en';
		this.language = lang;

		(function (i18n) {
			i18n.contents = demoJson;
			i18n.contents.prop = function (key) {
				var result = this;
				var keyArr = key.split('.');
				for (var index = 0; index < keyArr.length; index++) {
					var prop = keyArr[index];
					result = result[prop];
				}
				return result;
			};
			i18n.localize();
		})(this);
	};

	this.I18n.prototype.hasCachedContents = function () {
		return this.contents !== undefined;
	};

	this.I18n.prototype.lang = function (lang) {
		if (typeof lang === 'string') {
			this.language = lang;
		}
		this.localize();
		return this.language;
	};

	this.I18n.prototype.localize = function () {
		var contents = this.contents;
		if (!this.hasCachedContents()) {
			return;
		}
		var dfs = function (node, keys, results) {
			var isLeaf = function (node) {
				for (var prop in node) {
					if (node.hasOwnProperty(prop)) {
						if (typeof node[prop] === 'string') {
							return true;
						}
					}
				}
			}
			for (var prop in node) {
				if (node.hasOwnProperty(prop) && typeof node[prop] === 'object') {
					var myKey = keys.slice();
					myKey.push(prop);
					if (isLeaf(node[prop])) {
						//results.push(myKey.reduce((prev, current) => prev + '.' + current));	//not supported in older mobile broweser
						results.push(myKey.reduce( function (previousValue, currentValue, currentIndex, array) {
							return previousValue + '.' + currentValue;
						}));
					} else {
						dfs(node[prop], myKey, results);
					}
				}
			}
			return results;
		};
		var keys = dfs(contents, [], []);
		for (var index = 0; index < keys.length; index++) {
			var key = keys[index];
			if (contents.prop(key).hasOwnProperty(this.language)) {
				$('[data-i18n="'+key+'"]').text(contents.prop(key)[this.language]);
				$('[data-i18n-placeholder="'+key+'"]').attr('placeholder', contents.prop(key)[this.language]);
				$('[data-i18n-value="'+key+'"]').attr('value', contents.prop(key)[this.language]);
			} else {
				$('[data-i18n="'+key+'"]').text(contents.prop(key)['en']);
				$('[data-i18n-placeholder="'+key+'"]').attr('placeholder', contents.prop(key)['en']);
				$('[data-i18n-value="'+key+'"]').attr('value', contents.prop(key)['en']);
			}
		}
	};

}).apply(window);

$( document ).ready( function () {

	var i18n = new I18n();
	i18n.localize();
	$('.lang-picker #english').addClass('selected');
	
	$('.lang-picker #portuguese').on('click', function () {
		i18n.lang('pt');
		selectLang($(this));
	})
	$('.lang-picker #english').on('click', function () {
		i18n.lang('en');
		selectLang($(this));
	})
	$('.lang-picker #spanish').on('click', function () {
		i18n.lang('es');
		selectLang($(this));
	})

	function selectLang (picker) {
		$('.lang-picker li').removeClass('selected');
		picker.addClass('selected');
	}
});

            
          
!
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