You can use task status in the task list for your own internal tracking
of a task's status. A task's status changes to
“In Progress” automatically when you save a translation in the
Translation Workbench. In addition, it changes to
“Exported” and
“Imported” when those events
occur. You can also change a task's status manually (except that you
cannot manually change the status to
“Exported” or
“Imported”).