A woman speaks ancient languages while she sleeps. Her husband records these on tape. He calls expert linguists to identify the languages. Turns out it’s an older language every time. They are looking for the most ancient proto-language, however with every dream her condition deteriorates I think. Probably from 2000-2010.
Youth Without Youth?
https://en.wikipedia.org/wiki/Youth_Without_Youth_%28film%29
That’s the one, thanks.
Solved!