Anchor links not working on translated page

is that a wpml page?
WPML got WPML CMS Nav to translate the menus.

if your language plugin set the correct lang attributes to html – you an use it as:
( this example is for german pages a new logo link)

function av_change_logo_link_on_different_languages($link){
    $currentlang = get_bloginfo('language');
    if($currentlang=="de_DE"){
        $link = 'https://lang_specific_link';
    }
    return $link; 
}
add_filter('avf_logo_link','av_change_logo_link_on_different_languages');

Yes – on WPML this is the way – because we have on WPML for each language a separated Enfold Options Dialog. But i do not get an info – if it is a WPML Multilang Installation.

does your page have on html a lang attribute?
because your pages are password protected i can not inspect it.

for polylang try in child-theme functions.php:

function av_change_logo_link($link){
	$lang = pll_current_language('locale');
	switch ($lang) {
		case 'fr_FR':
		$link = "https://backlink_to_french_page";
		break;
		case 'de_DE':
		$link = "https://backlink_to_german_page";
		break;
	}
	return $link;
}
add_filter('avf_logo_link','av_change_logo_link');

adjust your languages with the examples given above
____________
or shorter if it is one default and one extra lang:

function av_change_logo_url($link){
    $lang = pll_current_language('locale');
    if ($lang == 'ro-RO') {
        $link = "https://your_needed_link";
    }
    return $link; 
}
add_filter('avf_logo_link','av_change_logo_url');

guess for Romanian it is ro_RO