Hi Yosikrivo! Yes it did work. Im using the Enfold theme. and the support team changed a few code in the functions.php file to let it work.
Not sure if this code below will help you?
add_filter('avf_logo','av_change_logo');
function av_change_logo($logo)
{
$lang = pll_current_language('locale');
switch ($lang) {
case 'en_US':
$logo = "https://www.kriesi.at/wp-content/themes/kriesi/images/logo.png";
break;
case 'af':
$logo = "https://www.kriesi.at/wp-content/themes/kriesi/images/logo.png";
break;
}
return $logo;
}