Exoglossic (adj)
ek-so-glo-sik
Denoting or relating to a non-indigenous language that is used as an official or second language in a particular country or community.
1980s from exo-, Greek glōssa ‘language, tongue’, and -ic.
Example sentences
“The Republic of India is an unfragmented, multilingual, part-exoglossic, multinational State.’”