This is about 3 tags only a few questions are tagged with. I want to discuss whether they are needed or not.
1) regional
Tag wiki excerpt:
Used to tag questions that have region-specific content (e.g. specific legal issues, clothing sizes)
3 questions are tagged regional. All are about the UK.
This seems to be a meta tag that doesn't tell the viewer much, if anything at all. It doesn't make sense as a filter, also. In this case, it would be better to have special tags for the regions. And before introducing new ones, make sure it's needed (legal issues are off topic, clothing sizes - translate them into a more common one (like if you used US customary system, add metric system in brackets) - no need for an extra tag).
2) restaurant
Tag wiki excerpt:
Somewhere you go to eat food in public.
1 question is tagged restaurant.
It's almost exactly 5 years old, yet was never used again. This is just an example of public-parenting and not really needed. Furthermore, the tag wiki excerpt does not fulfill the site's standards:
The main purpose of the tag wiki excerpt is to tell people what the tag should be used for.
3) disorder
No tag wiki excerpt.
10 questions are tagged disorder.
The questions seem to cover all possible meanings of "disorder". This tag seems way too unspecific. Add a tag wiki excerpt or get rid of it entirely?