The tags are fixed. You can vote for changing that here:
oh ok, so it’s not me ! Thanks Jan !
Well, as far as such tags are used we often use these in the different e-commerce-based businesses. But, these tags are usually fixed on such platforms, so you have to use these accordingly.
I am also willing to make these tags flexible according to our requirements. I hope to have them in the near future.
I am more interested in changing these tags according to the user's locations as well, like certain businesses, as a professional translation services provider, I need to get these tags according to the locations and languages of my customers. So, lets hope for the best mate!