I usually use bash or ruby to do scripting, but I think is a good idea to use the power of Swift to this task.
Define "often".
Besides, Swift wasn't even that ready for application develoment from day 1.
It was actually more pleasant than I thought, and I usually use Ruby for this. Might do this more often in the future.
But Ruby still has the benefit with gem install that can get you anything from a twitter client to an IRC-bot lib.