22 nights -
Chile - Patagonia - Puerto Natales, Torres del Paine, on to Ushuaia Argentina
https://www.lonelyplanet.com/chile/southern-patagonia
Or, Lake district -
https://www.lonelyplanet.com/chile/t...strict-1327021
Argentina - One day is enough at Igauzyu, but do not miss. Buenos Aires is great for a few days. Peninsula Valdez for wildlife. Patagonia - Ushuaia.
Many young people speak english, especially in tourist areas.