Translation issue when refreshing the add to cart form with ajax (changing product attributes)

Hello

Since version 7.x-1.11, we're experiencing some trouble with our add to cart form on our drupal installation.

When selecting a product variant, the form is refreshed ok.
All variant fields are translated (we use danish as the standard language), but the quantity field is reverted to english. Also the add to cart button changes from danish to english.

The furthest i can track the issue is that the form is rendered with drupal_render in commerce_cart_add_to_cart_form_attributes_refresh, but i cannot find information whether the form knows it should be rendered in english or danish.

Looking forward to your help