https://www.soundcu.com/wp-content/plugins/pixelspoke-translatepre…/ps-tp-auto-switcher.js?ver=1.2.0

1var ps_tp_auto_switcher = {
2	toggleEl: document.querySelectorAll('.ps_lang_switcher'),
3	bodyEl: document.querySelector('body'),
4	sanitize: function(string) {
5		return ( string ? string.replace('-', '_').replace(/[^\w_]/g,'') : '' )
6	},
7	chooseLang: function(langCode) {
8		window.localStorage.setItem("chooseLang", langCode);
9	},
10	getChosenLangCode: function() {
11		var that = this;
12		return that.sanitize(window.localStorage.getItem("chooseLang"));
13	},
14	getBrowserLang: function() {
15		var that = this;
16		return that.sanitize(window.navigator.language);
17	},
18	getCurrentLang: function() {
19		var that = this;
20		var tpClasses = Array.from(that.bodyEl.classList).filter(cl => cl.startsWith('translatepress-'));
21		return ( tpClasses.length > 0 ? tpClasses[0].replace('translatepress-', '') : false )
22
23	},
24	getTargetLang: function() {
25		var that = this;
26		return ( that.toggleEl.length > 0 ? that.sanitize(that.toggleEl[0].dataset.targetlangcode) : false);
27	},
28	init: function() {
29		var that = this;
30		that.toggleEl.forEach(function(el) {
31			el.addEventListener('click', function() {
32				that.chooseLang(that.sanitize(el.dataset.targetlangcode));
33			});
34		});
35		var chosen = that.getChosenLangCode();
36		if ( chosen ) {
37			// if chosen language is not current language switch to it
38		} else {
39			// if there is no chosen language
40			// and the browser language is different form the current language
41			// and the target language IS the same as the browser
42			// switch
43			var browser = that.getBrowserLang();
44			var current = that.getCurrentLang();
45			var target = that.getTargetLang();
46			if ( browser != current && browser == target ) {
47				// switcch to the browser version!!
48				window.location = that.toggleEl[0].href
49			}
50		}
51	}
52}
53ps_tp_auto_switcher.init();