English and Spanish (castellano) are the official languages in several countries. Mexico, Spain, Argentina, Costa Rica speak spanish (albeit with some differences, people from these countries can communicate with each other). United States, England, Ireland, South Africa speak English. Languages such as Korean and Finnish are not spoken in countries outside of their place of origin (at least, not by a sizable majority). Is there a terminology for languages such that aren't widely spoken outside their place of origin?
There is the pair of terms monocentric vs. pluricentric describing the situation whether only one cultural or economical centre is responsible for the definition of a standardised language or Hochsprache, or whether there are several centres (e.g. in the case of High German Germany (Berlin), Austria (Vienna) and Switzerland (Bern)).
However, this does not necessarily matches political boundaries, A language still may be monocentric and be spoken in several countries, or one country may host more than one centre of langauge standardisation.
Maybe one can borrow the term endemic for a language only occuring in one country from biology.