Polylang: Fix missing value on ACF relational fields

polylang-fix-acf-relational.php

<?php

/*
Plugin Name: Polylang: Fix missing value on ACF relational fields
Plugin Description: ACF relational Field value for translated posts types where not displayed when Admin langauge differs from post language.
Author: Jörn Lund
Author URI: http://github.org/mcguffin
Version: 0.0.1
*/



/**
 *	Polylang addon
 */
function polylang_acf_relational_field_fix_value_display( $query ) {
	global $polylang;
	if ( is_admin() && ($post = get_post() ) && ( $post_lang = pll_get_post_language($post->ID) ) && pll_current_language() !== $post_lang ) {
		// set 
		$query->set('lang',$post_lang);
	}
}
function polylang_acf_relational_field_fix_on() {
	add_action( 'parse_query' , 'polylang_acf_relational_field_fix_value_display' , 9 );
}
function polylang_acf_relational_field_fix_off() {
	remove_action( 'parse_query' , 'polylang_acf_relational_field_fix_value_display' , 9 );
}


add_action("acf/render_field/type=post_object", 'polylang_acf_relational_field_fix_on', 9, 1);
add_action("acf/render_field/type=post_object", 'polylang_acf_relational_field_fix_off', 11, 1);

add_action("acf/render_field/type=page_link", 'polylang_acf_relational_field_fix_on', 9, 1);
add_action("acf/render_field/type=page_link", 'polylang_acf_relational_field_fix_off', 11, 1);

add_action("acf/render_field/type=relationship", 'polylang_acf_relational_field_fix_on', 9, 1);
add_action("acf/render_field/type=relationship", 'polylang_acf_relational_field_fix_off', 11, 1);

Doesn't work...