Sorry, I didn't see that it was someone else.
In administration, the translation system of Falang/Joomfish is not activated. It's only on the front end.
For some key things like the order statuses, HikaShop manually translate it in the backend, but not the rest.
For example, product names are not translated either on the products listing...
The order creation notification is only sent to the buyer. The admin get the order admin notification. Did you change something in the emails ? Maybe that would explain the problem...