In D&D 5e, the general category is spellcasting focus, with arcane focus being a specific type of spellcasting focus. But there are other types of spellcasting focuses that are not arcane: Druidic focuses, holy symbols, musical instruments, and artisan tools. All of these are spellcasting focuses for their respective classes, and are not arcane focuses. Arcane focus is the spellcasting focus specific to only 3 of the 9 spellcasting classes available.
So unless this change would upset something with the 8 pathfinder questions (it shouldn’t based on my understanding), I think we should change the name of the tag.