There is no "One Republic" category on this site because there aren't enough questions to qualify. To qualify for a new category there should be close to 400 questions of the subject.
There is one.
Yes, you can Supervise more than one category.
No answers can be added to the WikiAnswers Local category.
The supervisors for the 'Questions about WikiAnswers' category are Kamuna and Dino10.
"WikiAnswers Local" is a placeholder category for questions about certain countries. No new questions should be added to the main "WikiAnswers Local" category.
No, there is not a specific "spite relationships" category on WikiAnswers. There is a standard "Relationships" category. You can further categorize into "friendship" or "marriage", for example, if your question is related to one of those.
That would be WikiAnswers Local.
WikiAnswers has a category called 'Most Amusing Questions Ever Asked on WikiAnswers'. The category is home to many amusing questions that also goes under the category strange, unusual, weird, etc. Below is the link to the category.
Special:Search
There is now a snowmobiling category under Sports.
The "Math" category with eight Supervisors.
In WikiAnswers there is a category called 'Quakers' it is a sub category of 'Religion and Spirituality'.