I have a Magento CE 2.0.7 install on Apache with PHP7 and MySQL 5.7. There are no plugins or modified/custom code. I set the locale to en_CA on installation through the web setup wizard.
I changed to production mode and the frontend directs to the proper pub/static/frontend/Magento/luma/en_CA/ directory but the backend/admin section points to pub/static/adminhtml/Magento/backend/en_US/ causing a 404 as that does not exist. The proper en_CA directory is in the file system with the proper permissions set but the admin side is requesting the en_US directory.
Has anyone else experienced this issue or have a resolution?