Multiple lists/audiences with WPML

Hi, I’m building a multilingual WooCommerce website (with WPML). So I have 2 Mailchimp lists/audiences, one in English and one in French. I need help to allow french visitors to subscribe to the french list and English visitors to subscribe to the English list.

WPML allows to detect de language displayed by the user with

<?php if( ICL_LANGUAGE_CODE === 'fr' ) {
	echo '';
} else {
	echo '';
} ?>

So I can echo the list/audience ID here but how to integrate this (function.php?).

Or maybe you have a better idea?

Thanks for your help.