Squanto was captured by Englishman George Weymouth in 1605, but when they brought him to England he was treated well and learned how to speak English fluently.
Put him in the cart!
Around 1615 when Squanto came back to his homeland his people were dying or dead from a disease most likely from smallpox.
After residing with the Wampanoag for awhile, in 1621 a Native American named Samoset, the first Native to meet the Pilgrims, introduced Squanto to them. But since Samoset didn't know English very well, Squanto did so he was able to serve as an interpreter for them. He had continued to do so until he died from a fever in 1622.