Order Status email

Hi everyone,

My Shopping cart is installed using 2 languages (french and english), the admin panel is in english, and everything is running good. Except for order status, if a customer log in under the french version of the cart, create account, select product, and validate his order, the order is displayed under the admin panel.

When I change the order status to any value complete, or processing whatever, the email sent to the customer is in english.

How can I change it to send to french if the customer is french and send the email in english if the customer is english ?

Thanks,