Original sentence: Out of some 5000 in 1900, as of 2005 there are about 20 speakers left.Some Tehuelche learnt Welsh and left their children with the Welsh to learn the language and get education; thus there is a solid photographic record of this people.The Chon languages were spoken in Tierra del Fuego and Patagonia.The Selk'nam people were widely studied by anthropologists throughout the 20th century; however, their language was not preserved.The Tehuelche - the tall nomads of Southern Patagonia - traded peacefully with Welsh settlers, but were persecuted by Argentine authorities.The Tehuelche language is also near extinction.Two were known to exist - Selk'nan, which went extinct in 2003, and Tehuelche.com entry on the Tehuelche language
Edited sentence: I bought several postcards of them in Chile (santiago)  but no one bothered to save their language.Maybe someone will yet record and save the Tehuelche culture - who knows.Maybe you.Out of some 5000 in 1900 there are about 20 speakers left.Selk'nam - these unique people lived in Tierra del Fuego and were widely studied and extensively photographed throughout the 20th century.Some Tehuelche learnt Welsh and left thier children with the Welsh to learn the language and get education, once again their is a solid photographic record of this people.The remaining Chon language is also near extinction - Tehuelche.The two Chon languages are Selk'nan which died out two years ago and Tehuelche.These were the tall nomads of S Patagonia.They traded peacefully with the Welsh settlers but were persecuted by the Argentine authorities and their land taken away