Polylang Logo url wrong

Hallo i have the problem that the logo urls are wrong:

I tried that with my own urls but it didn’t work out right

add_filter(‘avf_logo_link’,’av_change_logo’);
function av_change_logo($link)
{
$lang = pll_current_language(‘locale’);

switch ($lang) {
case ‚de_DE‘:
$link .= “http://corona-unternehmens-hilfe.com”;
break;
case ‘en_GB’:
$link .= “http://corona-unternehmens-hilfe.com/our-service/”;
break;
case ‚tr_TR‘:
$link .= “http://corona-unternehmens-hilfe.com/hizmetlerimiz/”;
break;
}
return $link;
}

thanks for the help