availability:

WPML Version: 3.9.1

description:

Synchronizes the value of a specified custom field across all translations of a given post. It only does it if the translation option for this custom field is set to Copy.

type:
action
category:
Miscellaneous
parameters:
do_action( 'wpml_sync_custom_field', $post_id, $custom_field );

For this action hook, you only need to provide a post ID and the slug of the custom field you want to synchronize.

hook example usage:
do_action( 'wpml_sync_custom_field', 1234, $event-date );