[Openstack-i18n] localised API message responses - possible?

Hi all, I'm just going through old questions on Ask OpenStack, and thought we might have an answer for this one: https://ask.openstack.org/en/question/4346/is-there-a-way-of-passing-the-lan... I wanted to know if it is possible to get the localized openstack messages when I make a openstack REST API call? If so how can I pass the language header? Regards, Tom