French language pack questions

Using zencart v1.3.9h

I installed French language pack v1.3.9-1.0 and have a couple of questions

In French when it displays new products for 'month'

The month is still in English. Does anybody know where the names of the months are kept ?

Also if the currency name is changed it will be the same for both English and French. Any way to solve this ?

My knowledge of php is limited so any help would be appreciated.

Any dates that is displayed, when french language is chosen, it's still in english.

in the general.php there's a function named zen_draw_date_selector and in the french.php and english.php
the months are defined. I guess there's a relationship between the two.

in the french.php there are two lines
define('TABLE_HEADING_NEW_PRODUCTS', 'Nouveaux produits pour %s')
Line #306 : define('TEXT_REVIEW_DATE_ADDED', 'Date d\'Ajout : %s');

where does the string for %s come from ? it should be in french but it's in english