Hello MarekR.
I’ve fond a small hack.
Because the pictures are the same in both language this little snippet will get the images from the default language.
global $sitepress;
$current_language = $sitepress->get_current_language();
$default_language = $sitepress->get_default_language();
$sitepress->switch_lang($default_language);
$images = get_field(‘album_photo’);
$sitepress->switch_lang($current_language);
$imagesCount = count($images);
Cheers
