I got a notification that this question was moved to the English language stack exchange, and I am curious why. I get that, yes, it does discuss the right English word to use for a label CTA, but it is also talking about a label on a CTA. Labels and terms are hugely important to user experience, and my concern isn't so much with the fate of this exact submission, but that leaves me to wonder what other questions have been moved away from here that are relevant to the UX stack. We're a holistic discipline, and it'll cover a lot of other ground that other stacks may also cover.
I am sure whoever moved it had their reasons, and I respect that, but I would like to understand why it was moved. I really would never think to look into a English language stack for label conventions, and don't want to have to start.