It happens fairly often that we need a button with versatile text like for instance "Create" vs "Update" <Related table>.
Actually, it costs a calculated field to accomplish, which is far from ideal for numerous reasons. Then, we place a merge field into the button text...
Why not imagine simply the common choice between text string OR calculation as for e-mail step, custom dialog box, popover titles and so much more other FM tools.
THANKS to consider it !