app/javascript/oldjs/locale/index.js
window.locales = {
'de': require('./de.json'),
'en': require('./en.json'),
'es': require('./es.json'),
'fr': require('./fr.json'),
'it': require('./it.json'),
'ja': require('./ja.json'),
'ko': require('./ko.json'),
'pt_BR': require('./pt_BR.json'),
'zh_CN': require('./zh_CN.json'),
'zh_TW': require('./zh_TW.json'),
};