Config file

common:
    availableLanguages: [en, fr]

With Koa

import Koa from 'koa';
import config from 'alp-config';
import language from 'alp-language';

const app = new Koa();
config(__dirname + '/config')(app);
language(app);

With Ibex (Browser)

import Ibex from 'ibex';
import config from 'alp-config';
import language from 'alp-language';

const app = new Ibex();
config('/config')(app);
language(app);

context

language: string

First accepted language in the header / in navigator.languages contained in availableLanguages, or the first language in availableLanguages.

firstAcceptedLanguage: string

The first accepted language in the header / in navigator.languages regardless of availableLanguages. Can be a locale. Usefull for date/time/...