Replace any translated string in WordPress themes or plugins

functions.php

<?php
/* Copy this in your child theme functions.php file */
function jba_change_plugin_translations( $translated_text, $text, $domain ) {
	switch ( $translated_text ) {
		case 'Lire plus' :
			$translated_text = 'Voir le produit';
		break;
	}
	return $translated_text;
}
add_filter( 'gettext', 'jba_change_plugin_translations', 20, 3 );