You searched for: “most international
international (adjective), more international, most international
1. Relating to, or involving two or more countries: An international commission or an international cooperation are two examples Joan found in her dictionary regarding this adjective.
2. A reference to extending across or transcending the boundaries of nations: The tennis champion had international fame.

The adjective international mostly pertains to something such as a company, a language, or an organization that involves more than a single country.