Fetching details from the dictionary...

each country; every country; various countries; all countries
各国の代表が集まって会議を開いた。
Representatives from various countries gathered to hold a meeting.
各国の料理を楽しめるレストランだ。
It is a restaurant where you can enjoy cuisine from various countries.
各国の文化には違いがある。
There are differences among the cultures of each country.