Immersion Mode
From WikiRaider
The Immersion Mode can be activated in the sound menu of Shadow of the Tomb Raider. If enabled, all characters in the game that have a mother tongue other than English will then use it. This way, most of the inhabitants of Paititi will talk in one of the Ancient Dialects present there, while in Kuwaq Yaku most people will speak Spanish.
The Immersion Mode helps players feel like they really are on an expedition in a foreign country.
