Far Cry Primal’s stone age characters converse using a made-up language called Wenja. Speaking to IGN in normal English, the game’s writer, Kevin Shortt, revealed that the in-game language is a fictional construct based on proto-European speech. Thankfully, the dialogue is subtitled, so players won’t be scratching their heads when someone grunts “klaatu barada nikto” at them.
This is a companion discussion topic for the original entry at http://www.quartertothree.com/fp/2016/01/28/how-do-you-say-prehistoric-owl-drone-strike-in-far-cry-primal/