filter FAQs by language?

Hi, I use your plugin by placing a [hrf_faqs] tag in my default lang page and another [hrf_faqs] tag in my additional language page. Can I pass a lang argument from outside (from the tag maybe)? I saw it works from within fn_hrf_faqs() function when passed to $faq_args but how can I pass it without code changes? Look at the last argument:

$faq_args = array(
        'post_type'      => 'hrf_faq',
        'post_status'    => 'publish',
        'posts_per_page' => -1,
        'orderby'        => 'menu_order',
        'order'          => 'ASC',
        'lang; => 'bg_BG' // <---- passed here works
   );

Is sth like [hrf_faqs lang=”bg_BG”] doable?

https://ww.wp.xz.cn/plugins/html5-responsive-faq/