[Resolved] ACF Relationship fields showing null for translated posts.

Thanks for replying, unfortunately that causes issues with "Cannot access offset of type array in isset or empty",

I found a solution to the issue using this:

```php

function get_post_language_code( $post_id ) {
// Apply the wpml_post_language_details filter to get all language info for a specific post ID
$language_details = apply_filters( 'wpml_post_language_details', null, $post_id );

// Check if details were returned and extract the language code
if ( $language_details && isset( $language_details['language_code'] ) ) {
return $language_details['language_code']; // Returns the 2-letter language code (e.g., 'en', 'fr')
}

return false; // Or handle the case where the language info is not found
}

// Fix ACF relationship fields to return translated IDs
add_filter('acf/format_value/type=relationship', function ($value, $post_id, $field) {
if (empty($value) || !function_exists('wpml_object_id_filter')) {
return $value;
}

// Convert IDs to the current language equivalents
$translated_values = array();
foreach ((array) $value as $id) {
$translated_values[] = wpml_object_id_filter($id, get_post_type($id), true, get_post_language_code($post_id));
}

return $translated_values;
}, 10, 3);

/**
* When querying for relationship fields, we already have the translated IDs.
* We need to make sure WPML doesn't filter these IDs out if the current language
* doesn't match the posts being queried (which can happen in GraphQL batches).
*/
add_filter( 'graphql_post_object_connection_query_args', function( $query_args ) {
if ( is_graphql_http_request() && ! empty( $query_args['post__in'] ) ) {
$query_args['suppress_wpml_where_and_join_filter'] = true;
}
return $query_args;
}, 10, 1 );```