The main language of Chile and Argentina including in Patagonia is Spanish. See our Chile and Argentina sections for more information.
You may be surprised to learn that Welsh is spoken in some parts of Argentine Patagonia. In the mid-1800s the first Welsh pioneers made the eight-week sailing to Argentina. They settled in Chubut Province in Patagonia and there are now around 5,000 Welsh speakers in Patagonia, especially in the settlements of Trelew, Gaiman, and Trevelin.
There is a very small community of Patagonian Afrikaans speakers around Comodoro Rivadavia.