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add_filter( 'get_the_archive_title', function ($title) {
    if ( is_post_type_archive( 'custom-post-slag' ) ) {
		$title = post_type_archive_title( '', false );
	} elseif ( is_category() ) {
		$title = single_cat_title( '', false );
	} elseif ( is_tag() ) {
		$title = single_tag_title( '', false );
	}

    return $title;
});