Link text boxes together

[jake51188]

How would you be able to change one text box and it change multiple other text boxes on the same layer or different layers? Ideally linking multiple text boxes together. 

Use case: I have a letter that sits on 12 places on an image. Every day I need to change that letter, instead of changing 12 different text boxes, could I just change one and it auto edit the rest?

Thanks,
Jake