A nation is a community of people formed on the basis of a common language, territory, ethnicity etc.
A country may be an independent sovereign state or part of a larger state, a physical territory with a government, or a geographic region associated with sets of previously independent or differently associated people.
"Country and State are synonymous terms that both apply to self-governing political entities. A nation, however, is a group of people who share the same culture but do not have sovereignty."
https://www.infoplease.com/world/diplomacy/state-country-and-nation
杜鲁多承认：魁北克是一个国家 官方语言是法语