Poly language combined with ACF

I would like to know if it is possible to get the language
from polylang within filtering query below?

Currently I have hardcoded $args[‘lang’] = ‘da’;
But i need to get the language code dynamically so when i change language in wp admin-mode the list will change acordingly to the choosen language.

function acf_relationship_query( $args, $field, $post ) {

	 $meta_query = array( array(
			 'key'     => '_start_date',
			 'value'   => time(),
			 'compare' => '>'
	 ));

    $args['post_type']  = 'events';
    $args['meta_query'] = $meta_query;
    $args['tax_query']  = $tax_query;
	$args['post__not_in'] = array( $post->ID );
	$args['order_by'] = 'meta_value_num';
	$args['lang'] = 'da';
	$args['order'] = 'ASC';

	return $args;

}

add_filter('acf/fields/relationship/query/key=field_52e7d0357f1c8', 'acf_relationship_query', 10, 3);

https://wordpress.org/plugins/advanced-custom-fields/