Duolingo Google TTS

LingoMultiTTS.user.js

//==UserScript==
//@name         LingoGoogleTTS
//@version      1.2
//@description  Use Google TTS for Duolingo
//@match        https://www.duolingo.com/*
//@match        http://www.duolingo.com/*
//@grant        none
//==/UserScript==

function googleTTSLang(targetLang) {
    if (targetLang == "dn") { return "nl"; }
    if (targetLang == "zs") { return "zh"; }
    return targetLang;
}



(function($) {
	if (typeof duo != 'undefined' && typeof $.tts_super == 'undefined') {
		var ttsBase = duo.tts_base_url, ttsPath = duo.tts_path;
		$.fn.tts_super = $.fn.tts;
		$.fn.tts = function(d) {
			var language = d.language;
			var gRand = function () {
				return Math.floor(Math.random() * 1000000) + '|' +
					Math.floor(Math.random() * 1000000) };
			duo.tts_base_url = "http://translate.google.com/translate_tts?ie=UTF-8&";

			if (d.tts_type === "sentence" && typeof d.sentence !== 'undefined') {
				var quoted_text = encodeURIComponent(d.sentence.replace("/"," "));
				d.language = googleTTSLang(d.language);
				duo.tts_path = 'tl=' + d.language + '&q=' + quoted_text +
					"&total=1&textlen=" + quoted_text.length +
					"&tk=" + gRand() + "&client=t";
				console.log("Requesting "+duo.tts_path);
			} else {
				// Use default for tokens (single words)
				duo.tts_base_url = ttsBase;
				duo.tts_path = ttsPath;
			}

			return this.each(function() {
				$(this).tts_super(d);
			});
		}
	}
}(jQuery));