More on Closures, JS

function makeGreeting(language) {

    return function(firstname, lastname) {
        if (language === 'en') {
            console.log(`Hello, ${firstname} ${lastname}.`);
        }

        if (language === 'es') {
            console.log(`Hola, ${firstname} ${lastname}.`);
        }
    }
}

var greetEnglish = makeGreeting('en');
var greetSpanish = makeGreeting('es');

greetEnglish('Jason', 'DeGraaf');
greetSpanish('Eddier', 'Vedder');