Polylang has changed the PLL() derived object

[SeenNotHurd]

line 181
$post_language = $polylang->model->get_post_language($post->ID);
should now be:
$post_language = $polylang->model->post->get_language($post->ID);

line 282
$term_language = $polylang->model->get_term_language($term->term_id);
Should now be:
$term_language = $polylang->model->term->get_language($term->term_id);

[grappler]

I think there is already a PR #37