地域に特定して存在する風習は「Customs and traditions」と言います。
例文:
- A country like Italy has regional customs and traditions. This is evidenced by the variety of food up and down the country
また、風習でなく「文化」という言葉を使うのも良いかもしれないですね:
例文:
- Even a country like Japan with a homogenous race has different cultures within it - people in Kansai behave behave and eat differently to people in Kanto.