Thread:CureHibiki/@comment-31119526-20170322124427/@comment-26868869-20170325062718

I think you two might know, but this is a very helpful tool for replacing text. You'd only have to be careful with the galleries to not accidentally rename the images too. 

For the images there is the "mass rename" extension, but I have not tried it out yet. . I'd also advise using this for anything but images, as we'd need to have an account with a bot flag then.