The only way to have the taxonomy term name in the title of a taxonomy term Commerce Products view page I've found so far is the example view in the estore theme (I still don't get how tid which should stand for Term ID becomes the title field value):
The problem is that the title shown is not translated on multilingual sites when the term definitely has a proper translation. Is there any way to show that title translated?
For some reason there are no Product: Has taxonomy term ID
as there is Content: Has taxonomy term ID
in the default taxonomy term view that is displaying the title translated.
AFAIU {{ arguments.tid|t }}
is not the way because it will go through a different subsystem.