JSFiddle - React, Tailwind, and code Playground

HTML

<button id="en">English</button>
<button id="de">German</button>
<button id="es">Spanish</button>
<div id="text"></div>
<br />
<br />
<div id="cur"></div>

JavaScript

var lang = "de";

$('#en').click(function () {
    lang = "en";
});
$('#de').click(function () {
    lang = "de";
});
$('#es').click(function () {
    lang = "es";
});

function showtext() {
    $('#text').text(lang);
    $('#cur').text(lang);
}

showtext();
setInterval(function () {
    showtext();
}, 2000);