JSFiddle - React, Tailwind, and code Playground

JavaScript

var lang = 
{
    fr:
    {
        welcome     : 'bonjour',
        good_bye    : 'à bientôt'
    },
    en:
    {
        welcome     : 'welcome',
        good_bye    : 'good bye'
    },
    es:
    {
        welcome     : 'holà',
        good_bye    : 'adios'
    }
}

function translate(country, word) {
   return lang[country][word]
}

var name = 'Jonas';
var country = 'es';
console.log(translate(country, 'welcome') + ' ' + name);