How A Made-Up Slavic Language Made It To The Big Screen

Klingon, Elvish, Dothraki, and Nadsat: there are plenty of invented languages used in movies. But one of them, Interslavic, has the potential to be useful to hundreds of millions of people. The language just made its movie debut in a wartime drama, The Painted Bird, and its creator says it could be used by Slavic speakers from Siberia to Slovenia.