No, it's not a proper word. It is, however, a word that is used somewhat frequently ;-)

In native English business circles, it's a word that someone made up so that they could say "what are our learnings" instead of "what did we learn". Why? To sound more sophisticated and pretentious - or so I suspect.

Anyway, yeah. People use it, even native speakers, even though the word should be taken out and shot.