// Set lang, eg. "en-int", "en-gbr", "en-usa", not "en_*"
// But in the phrases.js file they're with lowdashes as object key.
lang.set_lang(Abbreviation);
// App should reload after setting language.
Language code xx-xxx is stored in localStorage, get it using:
// Class window.lang is ready to use
lang.cur_lang();