This isn’t a complete workup, but hopefully it will help you paint a clearer picture of what your country looks like and how it operates.
Describe the land itself (mountains, hills, major rivers, volcanoes, oceans, etc.):
Type of government:
Major holidays and why they are holidays:
Modes of transportation:
What do the houses look like?
Common household decorations:
Is there anything interesting about the roads and how they are set up?
Is there anything interesting about the towns and how they are set up?
Main occupations in this country:
Who is allowed to own land and why?
Tax issues (high, low, yearly, monthly, oppressive, not oppressive, etc.):
Popular types of music and major instruments:
Common household pets:
Common family dynamics (number of kids, who works, upbringing, governess, nurse, etc.):
What is the biggest threat in this country?
Are there any unexpected social rules?
Major points of the country’s history:
What is one thing you could do to make this country more unique? (For example: Is the sky the same color as ours? Are trees the same color? Can the people do something that we can’t do in real life?)