As other posters point out I don’t think Airbus really care of the actual word used in many situations. ( aside from those specially published in the FCOM )Park Brake “set” or “On” conveys the meaning equally. If an Airline wishes to have a more specific response then they can publish it.
This is very similar to FMA callouts. Airbus say we must callout all mode changes. However what words do we use, LOC or LOCALIZER ? ALT STAR or ALT CAPTURE, CLB ( pronounced CLIB ) or CLIMB.? The reality is we must callout out to ensure common understanding of the current guidance modes, the exact words have secondary importance.