Get Woocommerce customer order language

I'm developing a complementary plugin for woocommerce. I have a sql request that gets all the order and customer info, but i need to get the language from the order.

How can i detect the language was using a customer when he made an order? Is it registered somewhere?

In other CMS like prestashop it's stored as id_lang in orders and customer tables.

Sorry for my English.

Thanks in advance!