Javascript simple localization methods

localization.js

module.exports = {
    currentLang: 'en',
    textList: null,
    setLang: function(lang) {
        this.currentLang = lang;
        this.textList = require(lang);
    },
    __t: function(key) {
         return typeof this.textList[key] === "undefined" ? "-" : this.textList[key];
    },
    __s: function(...key) {
        return typeof this.textList[key[0]] === "undefined" ? "-" : (this.textList[key[0]]).replace('%s1',key[1]).replace('%s2', key[2]);
    }
}

language files that should be in the same directory

en.js

module.exports = {
    "HELLO": "hello", // S:15 C:23
    "HELLO": "helloo", // S:25 C:23
    "WORLD": "word",
    "PAGINATION": "Pages: %s1 of %s2"
}

tr.js

module.exports = {
    "HELLO": "merhaba",
    "WORLD": "muz",
    "PAGINATION": "Sayfalar: %s1 - %s2"
}

---

use

const loc = require('./localization.js');
loc.__t('HELLO');