i took a look into file public_html/extensions/default_pp_pro/storefront/controller/responses/extension/default_pp_pro.php
well.. if your server supports french locale you can add
setlocale(LC_TIME, 'fr_FR.UTF8'); // note the charset info !
before
$months = array();
otherwise you can remove
for ($i = 1; $i <= 12; $i++) {
$months[ sprintf('%02d', $i) ] = strftime('%B', mktime(0, 0, 0, $i, 1, 2000));
}
and add manual array for ex.
$month = array('01' => 'ciчень', '02' => 'лютий'......etc);
Note: it's a solution only for single-lingual store.