You can also right-click and select a different language. But it's definitely the case that it does not use the environment language= settings. It really should.
** Bug 63951 has been marked a duplicate of this bug -- Default spelling on UK locale machine is English_US https://launchpad.net/bugs/58017 -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs