To replace click event of Language Switcher menu follow the steps below, very simple, and could be improved if you like.

scripts/lines 930-935;

    /* Language Switcher */
    $('.lang-switcher').on("click", function(e) {
        $('body').toggleClass('lang-switcher-open');
        e.preventDefault();
    });

try to replace as

    /* Language Switcher */
    $('.menu-lang').on('mouseenter', function() {
        $('.lang-switcher-dropdown').css({"top": $('.menu-lang').height() - (ozyCheckIs768el() ? 0 : 22) });
        $('body').addClass('lang-switcher-open');
    }).on('mouseleave', function() {
        $('body').removeClass('lang-switcher-open');
    });

Enjoy!