JSFiddle - React, Tailwind, and code Playground

JavaScript

fetch("https://raw.githubusercontent.com/nextcloud/server/master/resources/locales.json")
.then(response => response.json())
.then(locales => locales.map(l => l.code))
.then(codes => codes.map(code => 123.45.toLocaleString(code.replace(/_/g, "-")) + "\t" + code))
.then(result => document.write("<pre>" + result.join("\n") + "</pre>"));